[3] Name on the Register [4] Image Date listed [5] Location City or town Description 1 Antietam Furnace Complex Archeological Site Upload image August 25, 1983 (# 83002963 ) Address Restricted Hagerstown 2 Antietam Hall Antietam Hall September 24, 1979 (# 79003269 ) 525 Indian Lane 39°38′12″N 77°40′55″W / 39.636667°N 77.681944°W / 39.636667; -77.681944 (Antietam Hall ) Hagerstown 3 Antietam Iron Furnace Site and Antietam Village Antietam Iron Furnace Site and Antietam Village June 26, 1975 (# 75000149 ) Confluence of Antietam Creek and the Potomac River 39°25′01″N 77°44′33″W / 39.416944°N 77.7425°W / 39.416944; -77.7425 (Antietam Iron Furnace Site and Antietam Village ) Antietam 4 Antietam National Battlefield Antietam National Battlefield October 15, 1966 (# 66000038 ) North of Sharpsburg off Maryland Route 45 39°27′04″N 77°41′09″W / 39.451111°N 77.685833°W / 39.451111; -77.685833 (Antietam National Battlefield ) Sharpsburg Civil War battlefield site. 5 B&O Bridge B&O Bridge November 23, 1977 (# 77000704 ) Northwest of Keedysville over Antietam Creek 39°30′15″N 77°42′49″W / 39.504167°N 77.713611°W / 39.504167; -77.713611 (B&O Bridge ) Keedysville 6 B & O Railroad Potomac River Crossing B & O Railroad Potomac River Crossing February 14, 1978 (# 78001484 ) At the confluence of the Shenandoah and Potomac rivers 39°19′27″N 77°43′43″W / 39.324167°N 77.728611°W / 39.324167; -77.728611 (B & O Railroad Potomac River Crossing ) Harpers Ferry 7 Baker Farm Upload image October 19, 1978 (# 78001485 ) North of Keedysville off Maryland Route 34 39°29′53″N 77°41′42″W / 39.498056°N 77.695°W / 39.498056; -77.695 (Baker Farm ) Keedysville 8 Bell-Varner House Bell-Varner House September 24, 1979 (# 79003271 ) Southeast of Leitersburg on Unger Rd. 39°40′04″N 77°36′26″W / 39.667778°N 77.607222°W / 39.667778; -77.607222 (Bell-Varner House ) Leitersburg 9 Boonsboro Historic District Boonsboro Historic District December 23, 2005 (# 05001431 ) Main St., Potomac St., St. Paul St., High St., Lakin Ave., Center St., Park Dr., Park Ln, Park View, and Young Ave. 39°30′22″N 77°39′09″W / 39.506111°N 77.6525°W / 39.506111; -77.6525 (Boonsboro Historic District ) Boonsboro 10 Bowman House Bowman House April 29, 1977 (# 77000702 ) 323 N. Main St. 39°30′42″N 77°39′18″W / 39.51174°N 77.65497°W / 39.51174; -77.65497 (Bowman House ) Boonsboro 11 Brightwood Brightwood July 30, 1974 (# 74000973 ) North of Hagerstown off Maryland Route 60 , 2 miles (3.2 km) north of Paramont 39°41′56″N 77°40′43″W / 39.698889°N 77.678611°W / 39.698889; -77.678611 (Brightwood ) Hagerstown 12 Cedar Grove Upload image August 27, 1999 (# 99000984 ) 15435 Dellinger Rd. 39°32′07″N 77°50′07″W / 39.535278°N 77.835278°W / 39.535278; -77.835278 (Cedar Grove ) Williamsport 13 William Chapline House William Chapline House October 8, 1976 (# 76001020 ) 109 W. Main St. 39°27′29″N 77°44′59″W / 39.458056°N 77.749722°W / 39.458056; -77.749722 (William Chapline House ) Sharpsburg 14 Chesapeake and Ohio Canal National Historical Park Chesapeake and Ohio Canal National Historical Park October 15, 1966 (# 66000036 ) Bordering the Potomac River from Georgetown, Washington, D.C. to Cumberland, Maryland 39°35′53″N 77°49′40″W / 39.598147°N 77.827693°W / 39.598147; -77.827693 (Chesapeake and Ohio Canal National Historical Park ) Antietam , Cedar Grove , Hancock , and Sharpsburg 15 Robert Clagett Farm Upload image June 5, 1999 (# 99000132 ) Garrett's Mill Rd. 39°21′03″N 77°41′06″W / 39.350833°N 77.685°W / 39.350833; -77.685 (Robert Clagett Farm ) Knoxville 16 Colonial Theatre Colonial Theatre August 2, 1978 (# 78001478 ) 12-14 S. Potomac St. 39°38′28″N 77°43′13″W / 39.641111°N 77.720278°W / 39.641111; -77.720278 (Colonial Theatre ) Hagerstown 17 Cool Hollow Home Cool Hollow Home December 17, 2018 (# 100003253 ) 9302 Old National Pike 39°34′08″N 77°41′23″W / 39.5690°N 77.6898°W / 39.5690; -77.6898 (Cool Hollow Home ) Hagerstown 18 Ditto Knolls Ditto Knolls July 12, 1976 (# 76001014 ) East of Hagerstown on Landis Rd. 39°36′23″N 77°39′45″W / 39.60644°N 77.6626°W / 39.60644; -77.6626 (Ditto Knolls ) Hagerstown 19 Daniel Donnelly House Upload image December 24, 2003 (# 03001333 ) 14906 Falling Waters Rd. 39°33′23″N 77°51′15″W / 39.556389°N 77.854167°W / 39.556389; -77.854167 (Daniel Donnelly House ) Williamsport 20 Dorsey-Palmer House Dorsey-Palmer House April 15, 1978 (# 78001479 ) North of Hagerstown on Maryland Route 60 39°40′41″N 77°41′02″W / 39.678056°N 77.683889°W / 39.678056; -77.683889 (Dorsey-Palmer House ) Hagerstown 21 Doub Farm Upload image November 15, 1978 (# 78001486 ) North of Keedysville 39°29′37″N 77°41′51″W / 39.493611°N 77.6975°W / 39.493611; -77.6975 (Doub Farm ) Keedysville 22 Doub's Mill Historic District Doub's Mill Historic District October 1, 1979 (# 79003270 ) Southwest of Beaver Creek on Beaver Creek Rd. 39°34′43″N 77°39′18″W / 39.578611°N 77.655°W / 39.578611; -77.655 (Doub's Mill Historic District ) Beaver Creek 23 Elliot-Bester House Elliot-Bester House May 2, 1975 (# 75000924 ) 205-207 S. Potomac St. 39°38′19″N 77°43′22″W / 39.638611°N 77.722778°W / 39.638611; -77.722778 (Elliot-Bester House ) Hagerstown 24 Elmwood Elmwood December 26, 2012 (# 12001085 ) 16311 Kendle Rd. 39°35′10″N 77°48′06″W / 39.586095°N 77.801723°W / 39.586095; -77.801723 (Elmwood ) Williamsport 25 Joseph Fiery House Upload image December 27, 2002 (# 02001588 ) 15107 Hicksville Rd. 39°42′06″N 77°50′49″W / 39.701667°N 77.846944°W / 39.701667; -77.846944 (Joseph Fiery House ) Clear Spring 26 Fort Frederick Fort Frederick November 7, 1973 (# 73000939 ) Southeast of Big Pool near the junction of Maryland Routes 44 and 56 39°36′33″N 78°00′12″W / 39.609167°N 78.003333°W / 39.609167; -78.003333 (Fort Frederick ) Big Pool 27 Jacob M. Funk Farm Jacob M. Funk Farm October 14, 2010 (# 10000829 ) 21116 Black Rock Road 39°34′49″N 77°37′58″W / 39.580278°N 77.632778°W / 39.580278; -77.632778 (Jacob M. Funk Farm ) Hagerstown 28 Funkstown Historic District Funkstown Historic District September 8, 2000 (# 00001050 ) Roughly bounded by Antietam Creek , U.S. Route 40A , Stouffer Ave., and High St. 39°36′30″N 77°42′36″W / 39.608333°N 77.71°W / 39.608333; -77.71 (Funkstown Historic District ) Funkstown 29 Garden Hill Garden Hill December 27, 2002 (# 02001590 ) 1251 Frederick St. 39°36′49″N 77°42′45″W / 39.613611°N 77.7125°W / 39.613611; -77.7125 (Garden Hill ) Hagerstown 30 Geeting Farm Geeting Farm November 25, 1977 (# 77000705 ) South of Keedysville at Geeting and Dog Rds. 39°28′40″N 77°41′54″W / 39.477778°N 77.698333°W / 39.477778; -77.698333 (Geeting Farm ) Keedysville 31 Good-Hartle Farm Good-Hartle Farm December 9, 1999 (# 99001543 ) 13357 Little Antietam Rd. 39°40′52″N 77°37′41″W / 39.681111°N 77.628056°W / 39.681111; -77.628056 (Good-Hartle Farm ) Hagerstown 32 Good-Reilly House Good-Reilly House December 30, 2002 (# 02001591 ) 107 E. Main St. 39°27′30″N 77°44′55″W / 39.458333°N 77.748611°W / 39.458333; -77.748611 (Good-Reilly House ) Sharpsburg 33 Hager House Hager House November 5, 1974 (# 74000974 ) 19 Key St. 39°38′22″N 77°43′50″W / 39.639444°N 77.730556°W / 39.639444; -77.730556 (Hager House ) Hagerstown 34 William Hagerman Farmstead Upload image December 27, 2002 (# 02001592 ) 7207 Dam #4 Rd. 39°30′41″N 77°49′00″W / 39.511389°N 77.816667°W / 39.511389; -77.816667 (William Hagerman Farmstead ) Sharpsburg 35 Hagerstown Armory Hagerstown Armory September 25, 1985 (# 85002673 ) 328 N. Potomac St. 39°38′47″N 77°43′00″W / 39.646389°N 77.716667°W / 39.646389; -77.716667 (Hagerstown Armory ) Hagerstown 36 Hagerstown Charity School Hagerstown Charity School December 16, 1982 (# 82001601 ) 102 E. Washington St. 39°38′26″N 77°43′05″W / 39.640556°N 77.718056°W / 39.640556; -77.718056 (Hagerstown Charity School ) Hagerstown 37 Hagerstown City Park Historic District Hagerstown City Park Historic District July 5, 1990 (# 90001017 ) Roughly bounded by W. Howard St., Guilford Ave., Memorial, S. Walnut St., and the Norfolk & Western railroad line 39°38′10″N 77°43′50″W / 39.636111°N 77.730556°W / 39.636111; -77.730556 (Hagerstown City Park Historic District ) Hagerstown 38 Hagerstown Commercial Core Historic District Hagerstown Commercial Core Historic District January 17, 1983 (# 83002964 ) Potomac, Washington, Franklin, Antietam, Summit, and Jonathan Sts. 39°38′33″N 77°43′18″W / 39.6425°N 77.721667°W / 39.6425; -77.721667 (Hagerstown Commercial Core Historic District ) Hagerstown 39 Hagerstown Historic District Hagerstown Historic District February 2, 1994 (# 93001551 ) Roughly bounded by Prospect and Cannon Aves., Memorial Boulevard, and the CSX railroad line 39°38′23″N 77°43′06″W / 39.639722°N 77.718333°W / 39.639722; -77.718333 (Hagerstown Historic District ) Hagerstown 40 Harpers Ferry National Historical Park Harpers Ferry National Historical Park October 15, 1966 (# 66000041 ) At the confluence of the Shenandoah and Potomac rivers 39°18′59″N 77°43′09″W / 39.316389°N 77.719167°W / 39.316389; -77.719167 (Harpers Ferry National Historical Park ) Harpers Ferry 41 Joseph C. Hays House Joseph C. Hays House December 12, 2006 (# 06001125 ) 103-105 W. Main St. 39°27′30″N 77°44′58″W / 39.45829°N 77.74932°W / 39.45829; -77.74932 (Joseph C. Hays House ) Sharpsburg 42 Jacob Highbarger House Jacob Highbarger House December 27, 2002 (# 02001593 ) 201 W. Main St. 39°27′27″N 77°45′06″W / 39.45757°N 77.75161°W / 39.45757; -77.75161 (Jacob Highbarger House ) Sharpsburg 43 Hills, Dales and The Vinyard Hills, Dales and The Vinyard December 1, 2000 (# 00001460 ) 16 Dogstreet Rd. 39°29′00″N 77°42′25″W / 39.483333°N 77.706944°W / 39.483333; -77.706944 (Hills, Dales and The Vinyard ) Keedysville 44 Hitt's Mill and Houses Hitt's Mill and Houses April 12, 1979 (# 79001147 ) West of Keedysville off Maryland Route 34 39°29′06″N 77°42′44″W / 39.485°N 77.712222°W / 39.485; -77.712222 (Hitt's Mill and Houses ) Keedysville 45 Hoffman Farm Hoffman Farm October 10, 1997 (# 97001183 ) 18651 Keedysville Rd. 39°29′53″N 77°43′19″W / 39.498056°N 77.721944°W / 39.498056; -77.721944 (Hoffman Farm ) Keedysville 46 Hogmire-Berryman Farm Upload image March 28, 1980 (# 80001842 ) North of Spielman off Maryland Route 63 39°32′32″N 77°46′00″W / 39.542222°N 77.766667°W / 39.542222; -77.766667 (Hogmire-Berryman Farm ) Spielman 47 Houses At 16-22 East Lee Street Houses At 16-22 East Lee Street November 25, 1977 (# 77000703 ) 16-22 E. Lee St. 39°38′12″N 77°43′19″W / 39.636667°N 77.721944°W / 39.636667; -77.721944 (Houses At 16-22 East Lee Street ) Hagerstown 48 Huckleberry Hall Upload image December 28, 1990 (# 90001994 ) Charles Mill Rd., west of its junction with Maryland Route 64 39°41′18″N 77°35′27″W / 39.688333°N 77.590833°W / 39.688333; -77.590833 (Huckleberry Hall ) Leitersburg 49 Ingram-Schipper Farm Upload image September 24, 1979 (# 79003259 ) Mapleville Road (MD 66), North of Boonsboro 39°33′46″N 77°39′37″W / 39.562778°N 77.660278°W / 39.562778; -77.660278 (Ingram-Schipper Farm ) Boonsboro 50 Kennedy Farm Kennedy Farm November 7, 1973 (# 73000941 ) Chestnut Grove Rd. 39°22′47″N 77°42′56″W / 39.379722°N 77.715556°W / 39.379722; -77.715556 (Kennedy Farm ) Samples Manor Known as John Brown's Headquarters. 51 Keedy House Keedy House July 25, 1974 (# 74000972 ) Northwest of Boonsboro off U.S. Route 40A on Barnes Rd. 39°32′22″N 77°41′55″W / 39.53956°N 77.69858°W / 39.53956; -77.69858 (Keedy House ) Boonsboro 52 Keedysville Historic District Keedysville Historic District October 26, 2001 (# 01001183 ) Along Main St. 39°29′12″N 77°41′56″W / 39.486667°N 77.698889°W / 39.486667; -77.698889 (Keedysville Historic District ) Keedysville 53 Kefauver Place Upload image August 26, 2005 (# 05000908 ) 20515 Park Hall Rd. 39°27′01″N 77°39′14″W / 39.450278°N 77.653889°W / 39.450278; -77.653889 (Kefauver Place ) Rohrersville 54 Lantz-Zeigler House Lantz-Zeigler House October 8, 1998 (# 98001231 ) 21000 Leitersburg Pike 39°41′20″N 77°38′17″W / 39.688889°N 77.638056°W / 39.688889; -77.638056 (Lantz-Zeigler House ) Hagerstown 55 Lehman's Mill Historic District Lehman's Mill Historic District January 4, 1991 (# 90001945 ) Lehman's Mill Rd. between Marsh Pike and Marsh Run 39°42′41″N 77°40′34″W / 39.711389°N 77.676111°W / 39.711389; -77.676111 (Lehman's Mill Historic District ) Hagerstown 56 Leitersburg Historic District Leitersburg Historic District December 19, 2003 (# 03001295 ) Leitersburg-Smithsburg Rd., Leiter St., Leiter's Mill Rd., and Ringgold St. 39°41′42″N 77°37′15″W / 39.695°N 77.620833°W / 39.695; -77.620833 (Leitersburg Historic District ) Leitersburg 57 Long Meadows Long Meadows September 1, 1978 (# 78001480 ) North of Hagerstown on Marsh Pike 39°41′41″N 77°41′08″W / 39.694722°N 77.685556°W / 39.694722; -77.685556 (Long Meadows ) Hagerstown 58 Magnolia Plantation Upload image June 18, 1975 (# 75000926 ) Northwest of Knoxville off Sandy Hook Rd. 39°20′57″N 77°41′34″W / 39.349167°N 77.692778°W / 39.349167; -77.692778 (Magnolia Plantation ) Knoxville 59 Mannheim Upload image September 25, 1979 (# 79003260 ) San Mar Rd. 39°33′19″N 77°37′51″W / 39.555278°N 77.630833°W / 39.555278; -77.630833 (Mannheim ) San Mar 60 The Maples Upload image February 24, 1975 (# 75000927 ) 2 miles (3.2 km) southwest of Smithsburg on Maryland Route 66 39°37′23″N 77°39′38″W / 39.62306°N 77.660556°W / 39.62306; -77.660556 (The Maples ) Smithsburg 61 Marsh Mills Upload image November 22, 1996 (# 96001375 ) 17426 and 17432 Spielman Rd. 39°32′22″N 77°45′44″W / 39.539444°N 77.762222°W / 39.539444; -77.762222 (Marsh Mills ) Fairplay 62 Maryland Theatre Maryland Theatre November 13, 1976 (# 76001015 ) 21-23 S. Potomac St. 39°38′29″N 77°43′17″W / 39.641389°N 77.721389°W / 39.641389; -77.721389 (Maryland Theatre ) Hagerstown 63 Henry McCauley Farm Henry McCauley Farm June 29, 1976 (# 76001016 ) East of Hagerstown on Mt. Aetna Rd. 39°36′53″N 77°39′46″W / 39.61472°N 77.66278°W / 39.61472; -77.66278 (Henry McCauley Farm ) Hagerstown 64 Mount Airy Mount Airy July 10, 1986 (# 86001550 ) Maryland Route 34 39°26′55″N 77°46′04″W / 39.448611°N 77.767778°W / 39.448611; -77.767778 (Mount Airy ) Sharpsburg 65 Nicodemus Mill Complex Upload image August 2, 2001 (# 01000821 ) 20019 Nicodemus Mill Rd. 39°28′34″N 77°40′24″W / 39.476111°N 77.673333°W / 39.476111; -77.673333 (Nicodemus Mill Complex ) Keedysville 66 Oak Hill Historic District Oak Hill Historic District September 18, 1987 (# 87001574 ) Roughly bounded by W. Irvin, Potomac, and Prospect Aves. and Forest Dr. 39°39′18″N 77°42′38″W / 39.655°N 77.710556°W / 39.655; -77.710556 (Oak Hill Historic District ) Hagerstown 67 Old Forge Farm Old Forge Farm November 7, 1979 (# 79001145 ) East of Hagerstown 39°40′02″N 77°38′58″W / 39.667222°N 77.649444°W / 39.667222; -77.649444 (Old Forge Farm ) Hagerstown 68 Old National Pike Milestones Old National Pike Milestones November 27, 1975 (# 75002107 ) Maryland Routes 44 and 165 , U.S. Route 40 , Alternate U.S. Route 40, and Scenic U.S. Route 40 39°25′13″N 77°16′01″W / 39.420278°N 77.266944°W / 39.420278; -77.266944 (Old National Pike Milestones ) Hancock 69 Old Washington County Library Old Washington County Library October 2, 1978 (# 78001481 ) 21 Summit Ave. 39°38′34″N 77°43′24″W / 39.64268°N 77.72329°W / 39.64268; -77.72329 (Old Washington County Library ) Hagerstown 70 Packhouse Ford Packhouse Ford June 15, 2015 (# 15000349 ) Potomac R. at Canal Rd. 39°25′51″N 77°46′35″W / 39.4307°N 77.7765°W / 39.4307; -77.7765 (Packhouse Ford ) Sharpsburg A historic river crossing of the Potomac River . 71 Paradise Manor Paradise Manor March 31, 1978 (# 78001482 ) North of Hagerstown at 2550 Paradise Dr. 39°41′49″N 77°42′03″W / 39.696944°N 77.700833°W / 39.696944; -77.700833 (Paradise Manor ) Hagerstown 72 Piper House Piper House October 28, 1999 (# 99001279 ) 200 E. Main St. 39°27′31″N 77°44′45″W / 39.458611°N 77.745833°W / 39.458611; -77.745833 (Piper House ) Sharpsburg 73 Plumb Grove Plumb Grove December 7, 2011 (# 11000882 ) 12654 Broadfording Rd. 39°39′40″N 77°56′11″W / 39.661032°N 77.936432°W / 39.661032; -77.936432 (Plumb Grove ) Clear Spring 74 Potomac-Broadway Historic District Potomac-Broadway Historic District December 12, 1990 (# 90001804 ) Roughly Potomac St. and Oak Hill Ave. from Franklin St. to Maple Ave., and North Ave. and Broadway from Park Pl. to Mulberry 39°38′54″N 77°42′53″W / 39.648333°N 77.714722°W / 39.648333; -77.714722 (Potomac-Broadway Historic District ) Hagerstown 75 Potomac Mills Potomac Mills February 5, 2014 (# 13001166 ) River & Trough Rds. 39°25′50″N 77°46′53″W / 39.430608°N 77.781267°W / 39.430608; -77.781267 (Potomac Mills ) Shepherdstown 76 Price-Miller House Price-Miller House May 24, 1976 (# 76001018 ) 131-135 W. Washington St. 39°38′37″N 77°43′25″W / 39.6437°N 77.7237°W / 39.6437; -77.7237 (Price-Miller House ) Hagerstown 77 Rockland Farm Rockland Farm July 21, 1978 (# 78001483 ) 728 Antietam Dr. 39°39′21″N 77°41′20″W / 39.65578°N 77.68884°W / 39.65578; -77.68884 (Rockland Farm ) Hagerstown 78 Rockledge Rockledge December 18, 2003 (# 03001292 ) 13535 Foxfire Ln. 39°41′20″N 77°36′45″W / 39.688889°N 77.6125°W / 39.688889; -77.6125 (Rockledge ) Hagerstown 79 Rohrer House Rohrer House November 7, 1979 (# 79001146 ) East of Hagerstown 39°39′25″N 77°39′40″W / 39.656944°N 77.661111°W / 39.656944; -77.661111 (Rohrer House ) Hagerstown 80 Rose Hill Rose Hill April 11, 1973 (# 73000942 ) 0.5 miles (0.80 km) south of Williamsport on Maryland Route 63 39°34′41″N 77°49′08″W / 39.578056°N 77.818889°W / 39.578056; -77.818889 (Rose Hill ) Williamsport 81 Search Well Upload image January 17, 1983 (# 83002965 ) Southeast of Burtner on Manor Church Rd. 39°31′12″N 77°42′49″W / 39.52°N 77.713611°W / 39.52; -77.713611 (Search Well ) Burtner 82 Sharpsburg Historic District Sharpsburg Historic District December 24, 2008 (# 08001218 ) E. and W. Chapline, Antietam, and High Sts. and N. and S. Church, Mechanic, Hall, and Potomac Sts. 39°27′27″N 77°44′56″W / 39.4575°N 77.748889°W / 39.4575; -77.748889 (Sharpsburg Historic District ) Sharpsburg 83 Snively Farm Upload image September 24, 1979 (# 79001144 ) North of Eakles Mills on Mt. Briar Rd. 39°28′13″N 77°41′26″W / 39.470278°N 77.690556°W / 39.470278; -77.690556 (Snively Farm ) Eakles Mills 84 South Prospect Street Historic District South Prospect Street Historic District October 1, 1979 (# 79003261 ) 18-278 S. Prospect St. 39°38′29″N 77°43′35″W / 39.641389°N 77.726389°W / 39.641389; -77.726389 (South Prospect Street Historic District ) Hagerstown 85 Sprechers Mill House Upload image January 5, 1978 (# 78001487 ) Northeast of Williamsport on Hopewell Rd. 39°37′02″N 77°47′40″W / 39.617222°N 77.794444°W / 39.617222; -77.794444 (Sprechers Mill House ) Williamsport 86 Springfield Farm Springfield Farm July 30, 1974 (# 74000977 ) South of U.S. Route 11 39°35′48″N 77°48′57″W / 39.596667°N 77.815833°W / 39.596667; -77.815833 (Springfield Farm ) Williamsport 87 St. Mark's Episcopal Church-Lappans St. Mark's Episcopal Church-Lappans August 5, 1999 (# 99000931 ) 18313 Lappans Rd. 39°33′03″N 77°44′03″W / 39.550833°N 77.734167°W / 39.550833; -77.734167 (St. Mark's Episcopal Church-Lappans ) Boonsboro 88 Tammany Tammany September 24, 1979 (# 79003262 ) Northeast of Williamsport off U.S. Route 11 39°36′39″N 77°47′44″W / 39.610833°N 77.795556°W / 39.610833; -77.795556 (Tammany ) Williamsport 89 Tolson's Chapel Tolson's Chapel October 21, 2008 (# 08001012 ) 111 E. High St. 39°27′22″N 77°44′47″W / 39.4561°N 77.7464°W / 39.4561; -77.7464 (Tolson's Chapel ) Sharpsburg Designated a National Historic Landmark in 2021. 90 Trovinger Mill Trovinger Mill April 21, 1975 (# 75000925 ) 3 miles (4.8 km) east of Hagerstown on Trovinger Mill Rd. and Antietam Creek 39°39′09″N 77°39′56″W / 39.6525°N 77.6656°W / 39.6525; -77.6656 (Trovinger Mill ) Hagerstown 91 Valentia Valentia June 27, 1974 (# 74000975 ) South of Hagerstown on Poffenberger Rd. off Maryland Route 65 39°35′42″N 77°42′41″W / 39.595°N 77.7114°W / 39.595; -77.7114 (Valentia ) Hagerstown 92 Washington County Courthouse Washington County Courthouse December 24, 1974 (# 74000976 ) W. Washington St. and Summit Ave. 39°38′34″N 77°43′22″W / 39.6428°N 77.7228°W / 39.6428; -77.7228 (Washington County Courthouse ) Hagerstown 93 Washington Monument Washington Monument November 3, 1972 (# 72000588 ) Washington Monument State Park 39°30′02″N 77°37′24″W / 39.500475°N 77.623258°W / 39.500475; -77.623258 (Washington Monument ) Boonsboro 94 Western Maryland Railroad Right-of-Way, Milepost 126 to Milepost 160 Western Maryland Railroad Right-of-Way, Milepost 126 to Milepost 160 July 23, 1981 (# 81000078 ) Milepost 126 to Milepost 160 39°33′53″N 78°32′08″W / 39.5647°N 78.5356°W / 39.5647; -78.5356 (Western Maryland Railroad Right-of-Way, Milepost 126 to Milepost 160 ) Woodmont 95 Western Maryland Railway Station Western Maryland Railway Station April 22, 1976 (# 76001019 ) Burhans Boulevard 39°38′44″N 77°43′34″W / 39.6456°N 77.7261°W / 39.6456; -77.7261 (Western Maryland Railway Station ) Hagerstown 96 Western Maryland Railway Steam Locomotive No. 202 Western Maryland Railway Steam Locomotive No. 202 June 7, 1984 (# 84001884 ) City Park 39°38′06″N 77°44′06″W / 39.635°N 77.735°W / 39.635; -77.735 (Western Maryland Railway Steam Locomotive No. 202 ) Hagerstown 97 Williamsport Historic District Williamsport Historic District October 26, 2001 (# 01001184 ) Roughly bounded by the Chesapeake and Ohio Canal , Conococheague Creek , Springfield Ln., and W. Frederick St. 39°35′58″N 77°49′15″W / 39.5994°N 77.8208°W / 39.5994; -77.8208 (Williamsport Historic District ) Williamsport 98 The Willows The Willows February 23, 1973 (# 73000940 ) Southwest of Cavetown on Maryland Route 66 39°37′34″N 77°36′12″W / 39.6261°N 77.6034°W / 39.6261; -77.6034 (The Willows ) Cavetown 99 Wilson School Wilson School October 30, 1998 (# 98001293 ) Rufus Wilson Rd. 39°39′23″N 77°51′11″W / 39.6564°N 77.8531°W / 39.6564; -77.8531 (Wilson School ) Clear Spring 100 Wilson's Bridge Wilson's Bridge March 15, 1982 (# 82002822 ) U.S. Route 40 39°39′27″N 77°50′53″W / 39.6575°N 77.8481°W / 39.6575; -77.8481 (Wilson's Bridge ) Hagerstown 101 Rufus Wilson Complex Rufus Wilson Complex December 6, 1996 (# 96001416 ) 14293 Rufus Wilson Rd. 39°39′22″N 77°51′06″W / 39.6561°N 77.8517°W / 39.6561; -77.8517 (Rufus Wilson Complex ) Clear Spring 102 Wilson-Miller Farm Upload image May 23, 1980 (# 80001841 ) Southeast of Sharpsburg 39°26′24″N 77°45′57″W / 39.44°N 77.7658°W / 39.44; -77.7658 (Wilson-Miller Farm ) Sharpsburg 103 Woburn Manor Upload image September 13, 2000 (# 00001052 ) 7661 Dam #4 Rd. 39°31′24″N 77°48′45″W / 39.5233°N 77.8125°W / 39.5233; -77.8125 (Woburn Manor ) Sharpsburg