[3] Name on the Register Image Date listed [4] Location Municipality Description 1 Academy Hill Historic District Academy Hill Historic District April 29, 1999 (# 99000516 ) Roughly bounded by Baughman Street, North Maple Avenue, Kenneth Street, Culbertson Avenue, Beacon Street, and Pennsylvania Avenue 40°18′39″N 79°32′42″W / 40.310833°N 79.545°W / 40.310833; -79.545 (Academy Hill Historic District ) Greensburg 2 Allegheny River Lock and Dam No. 4 Allegheny River Lock and Dam No. 4 April 21, 2000 (# 00000398 ) 1 River Avenue 40°36′52″N 79°42′59″W / 40.614444°N 79.716389°W / 40.614444; -79.716389 (Allegheny River Lock and Dam No. 4 ) Lower Burrell Extends into Harrison Township in Allegheny County 3 Aluminum Research Laboratories Aluminum Research Laboratories July 23, 2013 (# 98000413 ) Freeport Road 40°34′19″N 79°45′21″W / 40.571944°N 79.755833°W / 40.571944; -79.755833 (Aluminum Research Laboratories ) New Kensington 4 Bells Mills Covered Bridge Bells Mills Covered Bridge June 27, 1980 (# 80003648 ) West of Yukon 40°13′09″N 79°42′37″W / 40.219167°N 79.710278°W / 40.219167; -79.710278 (Bells Mills Covered Bridge ) Sewickley and South Huntingdon Townships 5 Brush Creek Salems Church Brush Creek Salems Church May 11, 1987 (# 87000675 ) Southeast of Westmoreland City on Brush Creek Road 40°19′09″N 79°39′30″W / 40.319167°N 79.658333°W / 40.319167; -79.658333 (Brush Creek Salems Church ) Hempfield Township 6 Brush Hill Brush Hill October 14, 1975 (# 75001677 ) 651 Brush Hill Road 40°19′30″N 79°41′22″W / 40.325°N 79.689444°W / 40.325; -79.689444 (Brush Hill ) Irwin 7 Bushy Run Battlefield Bushy Run Battlefield October 15, 1966 (# 66000696 ) 2 miles (3.2 km) east of Harrison City on Pennsylvania Route 993 40°21′21″N 79°37′30″W / 40.355833°N 79.625°W / 40.355833; -79.625 (Bushy Run Battlefield ) Penn Township 8 Byerly House Byerly House July 18, 1985 (# 85001567 ) 115 Menk Road, east of New Kensington 40°33′14″N 79°41′02″W / 40.553889°N 79.683889°W / 40.553889; -79.683889 (Byerly House ) Upper Burrell Township 9 Charleroi-Monessen Bridge Charleroi-Monessen Bridge June 22, 1988 (# 88000812 ) Legislative Route 247 over the Monongahela River 40°09′06″N 79°54′15″W / 40.151667°N 79.904167°W / 40.151667; -79.904167 (Charleroi-Monessen Bridge ) Monessen Extends into North Charleroi in Washington County 10 Citizens National Bank of Latrobe Citizens National Bank of Latrobe November 1, 2002 (# 02001281 ) 816 Ligonier Street 40°19′00″N 79°23′05″W / 40.316667°N 79.384722°W / 40.316667; -79.384722 (Citizens National Bank of Latrobe ) Latrobe 11 Compass Inn Compass Inn February 24, 1995 (# 95000124 ) Junction of U.S. Route 30 (the Lincoln Highway) and California Avenue 40°12′43″N 79°11′57″W / 40.211944°N 79.199167°W / 40.211944; -79.199167 (Compass Inn ) Ligonier Township 12 Concord School Concord School September 30, 2014 (# 14000817 ) Loyalhanna Dam Rd. 40°26′28″N 79°28′04″W / 40.441111°N 79.467916°W / 40.441111; -79.467916 (Concord School ) Loyalhanna Township 1848 schoolhouse. 13 Dick Building Dick Building August 30, 2007 (# 07000890 ) 201– 203 East Main Street 40°12′06″N 79°46′00″W / 40.201667°N 79.766667°W / 40.201667; -79.766667 (Dick Building ) West Newton 14 Fairview Park Fairview Park December 27, 2010 (# 10001069 ) South side of Old Route 22, approximately 1.5 miles (2.4 km) east of Delmont 40°24′21″N 79°33′21″W / 40.405833°N 79.555972°W / 40.405833; -79.555972 (Fairview Park ) Salem Township 15 Adam Fisher Homestead Adam Fisher Homestead February 28, 1991 (# 91000230 ) Brinkerton Road near junction with Mount Pleasant Road, northwest of Calumet 40°13′09″N 79°30′10″W / 40.219167°N 79.502778°W / 40.219167; -79.502778 (Adam Fisher Homestead ) Mount Pleasant Township 16 Fort Ligonier Site Fort Ligonier Site January 21, 1975 (# 75001678 ) South Market Street 40°14′27″N 79°14′16″W / 40.240833°N 79.237778°W / 40.240833; -79.237778 (Fort Ligonier Site ) Ligonier 17 Fullerton Inn Fullerton Inn June 30, 1983 (# 83002285 ) 11029 Old Trail Road, west of Irwin 40°19′47″N 79°43′35″W / 40.329722°N 79.726389°W / 40.329722; -79.726389 (Fullerton Inn ) North Huntingdon Township 18 Greensburg Downtown Historic District Greensburg Downtown Historic District July 21, 1995 (# 95000884 ) Roughly bounded by Tunnel Street, Main Street, Third Street and Harrison Avenue 40°18′11″N 79°32′42″W / 40.303056°N 79.545°W / 40.303056; -79.545 (Greensburg Downtown Historic District ) Greensburg 19 Greensburg Railroad Station Greensburg Railroad Station November 7, 1977 (# 77001202 ) Harrison Avenue 40°18′16″N 79°32′49″W / 40.304444°N 79.546944°W / 40.304444; -79.546944 (Greensburg Railroad Station ) Greensburg 20 Hannastown Farm Hannastown Farm March 17, 1994 (# 94000209 ) Northwest of the junction of Township 825 and Legislative Route 64054 40°21′11″N 79°30′21″W / 40.353056°N 79.505833°W / 40.353056; -79.505833 (Hannastown Farm ) Salem Township 21 Household No. 1 Site (36WM61) Household No. 1 Site (36WM61) March 20, 1986 (# 86000465 ) Off Timms Lane [5] 40°10′27″N 79°46′44″W / 40.174167°N 79.778889°W / 40.174167; -79.778889 (Household No. 1 Site (36WM61) ) Rostraver Township 22 Kingston House Kingston House June 30, 1983 (# 83002286 ) U.S. Route 30 , northeast of Youngstown 40°17′28″N 79°20′29″W / 40.291111°N 79.341389°W / 40.291111; -79.341389 (Kingston House ) Unity Township 23 Latrobe Armory Latrobe Armory December 22, 1989 (# 89002076 ) 1017 Ridge Avenue 40°19′00″N 79°22′53″W / 40.316667°N 79.381389°W / 40.316667; -79.381389 (Latrobe Armory ) Latrobe 24 Laurel Hill Furnace Laurel Hill Furnace April 28, 1975 (# 75001679 ) Southeast of New Florence on Baldwin Run 40°22′00″N 79°03′32″W / 40.366667°N 79.058889°W / 40.366667; -79.058889 (Laurel Hill Furnace ) St. Clair Township 25 Ligonier Armory Ligonier Armory May 9, 1991 (# 91000514 ) 358 West Main Street 40°14′49″N 79°14′33″W / 40.246944°N 79.2425°W / 40.246944; -79.2425 (Ligonier Armory ) Ligonier Demolished. [6] 26 Ligonier Historic District Ligonier Historic District August 30, 1994 (# 94001054 ) Junction of Main and Market Streets 40°14′35″N 79°14′16″W / 40.243056°N 79.237778°W / 40.243056; -79.237778 (Ligonier Historic District ) Ligonier 27 Linn Run State Park Family Cabin District Linn Run State Park Family Cabin District February 12, 1987 (# 87000107 ) 2 miles (3.2 km) southeast of Rector on Linn Run Road 40°09′14″N 79°13′00″W / 40.153889°N 79.216667°W / 40.153889; -79.216667 (Linn Run State Park Family Cabin District ) Cook Township 28 Loyalhanna Lodge No. 275 Loyalhanna Lodge No. 275 February 2, 2016 (# 15001036 ) 221 Spring St. 40°18′54″N 79°23′00″W / 40.315000°N 79.383333°W / 40.315000; -79.383333 (Loyalhanna Lodge No. 275 ) Latrobe 29 Andrew and Jennie McFarlane House Andrew and Jennie McFarlane House August 4, 2004 (# 04000807 ) 50 Maus Drive, west of Irwin 40°19′47″N 79°44′21″W / 40.329722°N 79.739167°W / 40.329722; -79.739167 (Andrew and Jennie McFarlane House ) North Huntingdon Township 30 Mount Pleasant Armory Mount Pleasant Armory December 22, 1989 (# 89002079 ) Eagle and Spring Streets 40°08′59″N 79°32′54″W / 40.149722°N 79.548333°W / 40.149722; -79.548333 (Mount Pleasant Armory ) Mount Pleasant Demolished in 1996 [7] 31 Mount Pleasant Historic District Mount Pleasant Historic District July 23, 1998 (# 98000903 ) Roughly along Main, South Church, Eagle, Walnut and College Streets 40°08′54″N 79°32′41″W / 40.148333°N 79.544722°W / 40.148333; -79.544722 (Mount Pleasant Historic District ) Mount Pleasant 32 Mount St. Peter Roman Catholic Church Mount St. Peter Roman Catholic Church May 5, 1998 (# 98000398 ) 100 Freeport Road 40°33′50″N 79°45′42″W / 40.563889°N 79.761667°W / 40.563889; -79.761667 (Mount St. Peter Roman Catholic Church ) New Kensington 33 New Kensington Downtown Historic District New Kensington Downtown Historic District July 23, 1998 (# 98000904 ) Roughly bounded by 8th Avenue, 3rd Street, 11th Avenue, and Barnes Avenue 40°33′58″N 79°45′58″W / 40.566111°N 79.766111°W / 40.566111; -79.766111 (New Kensington Downtown Historic District ) New Kensington 34 New Kensington Production Works Historic District New Kensington Production Works Historic District May 7, 1998 (# 98000397 ) Roughly along the Allegheny River , from Sixteenth Street to Seventh Street 40°33′56″N 79°46′13″W / 40.565556°N 79.770278°W / 40.565556; -79.770278 (New Kensington Production Works Historic District ) New Kensington 35 Samuel Patterson House Samuel Patterson House March 7, 1985 (# 85000472 ) Pennsylvania Route 981 , north of New Alexandria 40°23′58″N 79°25′20″W / 40.399444°N 79.422222°W / 40.399444; -79.422222 (Samuel Patterson House ) Derry Township 36 Pennsylvania Railroad Station-Latrobe Pennsylvania Railroad Station-Latrobe July 17, 1986 (# 86001689 ) Depot Street 40°19′07″N 79°23′08″W / 40.318611°N 79.385556°W / 40.318611; -79.385556 (Pennsylvania Railroad Station-Latrobe ) Latrobe 37 Plumer House Plumer House December 6, 1979 (# 79002368 ) Vine and South Water Street 40°12′33″N 79°46′10″W / 40.209167°N 79.769444°W / 40.209167; -79.769444 (Plumer House ) West Newton 38 Ross Furnace Ross Furnace September 6, 1991 (# 91001142 ) Southwest of Tubmill Reservoir off Pennsylvania Route 711 40°19′33″N 79°05′26″W / 40.325833°N 79.090556°W / 40.325833; -79.090556 (Ross Furnace ) Fairfield Township 39 St. Gertrude Roman Catholic Church St. Gertrude Roman Catholic Church September 23, 1983 (# 83002287 ) 311 Franklin Avenue 40°35′59″N 79°33′52″W / 40.599722°N 79.564444°W / 40.599722; -79.564444 (St. Gertrude Roman Catholic Church ) Vandergrift 40 St. Vincent Archabbey Gristmill St. Vincent Archabbey Gristmill January 18, 1978 (# 78002486 ) Southwest of Latrobe off U.S. Route 30 40°17′43″N 79°24′10″W / 40.295278°N 79.402778°W / 40.295278; -79.402778 (St. Vincent Archabbey Gristmill ) Unity Township 41 Salem Crossroads Historic District Salem Crossroads Historic District September 18, 1978 (# 78002484 ) Pittsburgh and Greensburg Streets 40°24′44″N 79°34′10″W / 40.412222°N 79.569444°W / 40.412222; -79.569444 (Salem Crossroads Historic District ) Delmont 42 Scottdale Armory Scottdale Armory May 9, 1991 (# 91000518 ) 501 North Broadway Street 40°06′17″N 79°35′08″W / 40.104722°N 79.585556°W / 40.104722; -79.585556 (Scottdale Armory ) Scottdale 43 Scottdale Historic District Scottdale Historic District March 29, 1996 (# 96000320 ) Roughly bounded by Walnut Street, Constitution Way, Arthur Avenue and Jacob's Creek 40°06′05″N 79°35′22″W / 40.101389°N 79.589444°W / 40.101389; -79.589444 (Scottdale Historic District ) Scottdale 44 Sewickley Manor Sewickley Manor April 19, 1982 (# 82003820 ) Legislative Route 64136, north of Calumet 40°14′05″N 79°28′56″W / 40.234722°N 79.482222°W / 40.234722; -79.482222 (Sewickley Manor ) Mount Pleasant Township 45 Site of Old Hannastown Site of Old Hannastown January 26, 1972 (# 72001180 ) 4 miles (6.4 km) northeast of Greensburg 40°20′37″N 79°30′19″W / 40.343611°N 79.505278°W / 40.343611; -79.505278 (Site of Old Hannastown ) Hempfield Township 46 Slickville Historic District Slickville Historic District June 3, 1994 (# 94000522 ) Roughly bounded by Greenburg and Second Avenue and Delmont, Court, Cottage and Fred Streets, in Slickville 40°27′27″N 79°31′23″W / 40.4575°N 79.523056°W / 40.4575; -79.523056 (Slickville Historic District ) Salem Township 47 Squirrel Hill Site Squirrel Hill Site March 26, 1980 (# 80003647 ) West of New Florence near the banks of the Conemaugh River [8] 40°22′49″N 79°05′20″W / 40.380278°N 79.088889°W / 40.380278; -79.088889 (Squirrel Hill Site ) St. Clair Township 48 Vandergrift Historic District Vandergrift Historic District April 27, 1995 (# 95000525 ) Roughly bounded by Lincoln, Sherman, Franklin and Washington Avenues, along the outer lot lines 40°36′09″N 79°33′44″W / 40.6025°N 79.562222°W / 40.6025; -79.562222 (Vandergrift Historic District ) Vandergrift 49 John Walter Farmstead John Walter Farmstead July 21, 1995 (# 95000885 ) 166 Mamont Drive 40°28′19″N 79°35′21″W / 40.471984°N 79.589261°W / 40.471984; -79.589261 (John Walter Farmstead ) Washington Township 50 Samuel Warden House Samuel Warden House November 7, 1995 (# 95001252 ) 200 South Church Street 40°08′52″N 79°32′50″W / 40.147778°N 79.547222°W / 40.147778; -79.547222 (Samuel Warden House ) Mount Pleasant 51 Webster Donora Bridge Webster Donora Bridge June 22, 1988 (# 88000813 ) Pennsylvania Route 143 over the Monongahela River at Webster 40°11′03″N 79°51′08″W / 40.184167°N 79.852222°W / 40.184167; -79.852222 (Webster Donora Bridge ) Rostraver Township Extends into Washington County 52 West Overton Historic District West Overton Historic District July 18, 1985 (# 85001572 ) Frick Avenue 40°06′59″N 79°33′59″W / 40.116389°N 79.566389°W / 40.116389; -79.566389 (West Overton Historic District ) East Huntingdon Township 53 Western Division-Pennsylvania Canal Western Division-Pennsylvania Canal September 17, 1974 (# 74001817 ) Along the Conemaugh River 40°25′30″N 79°13′48″W / 40.425°N 79.23°W / 40.425; -79.23 (Western Division-Pennsylvania Canal ) Bell Township , Bolivar , Derry Township , Fairfield Township , and Loyalhanna Township Boundaries increased on November 14, 1982 under the name "Western Division of the PA Canal" 54 Westmoreland County Courthouse Westmoreland County Courthouse March 30, 1978 (# 78002485 ) North Main Street 40°18′09″N 79°32′46″W / 40.3025°N 79.546111°W / 40.3025; -79.546111 (Westmoreland County Courthouse ) Greensburg