Baldwin is an unincorporated community in Baltimore County, Maryland, United States. The USPS has assigned Baldwin the ZIP Code 21013. Until 1958, this community was served by the Maryland and Pennsylvania Railroad at milepost 18.4. Hidden Valley Farm was listed on the National Register of Historic Places in 1983.
Calvert is an unincorporated community in Cecil County, Maryland, United States, approximately six miles east of Rising Sun.
Williston is an unincorporated town and census-designated place on the Eastern Shore of the U.S. state of Maryland, in Caroline County. As of the 2010 census it had a population of 155. It is situated between Maryland Route 16 on its eastern edge and the Choptank River on its west. It was originally known as Potter's Landing for its first resident, Zabdiel Potter. His home, Potter Hall, was listed on the National Register of Historic Places in 1982.
Muddy Creek is a tributary of the Susquehanna River in York County, Pennsylvania, in the United States.
St. Mary's Church and Cemetery is a historic Roman Catholic church building and cemetery in Crompton, a village of West Warwick, Rhode Island.
Upper Fairmount is an unincorporated community in Somerset County, Maryland, United States. It is located at the intersection of Maryland Route 361 and Upper Hill Road. The Academy Grove Historic District, Maddux House, Schoolridge Farm, Tudor Hall, and Upper Fairmount Historic District are listed on the National Register of Historic Places.
Manokin is an unincorporated community in Somerset County, Maryland, United States. It is located on Maryland Route 361 at the intersection of River Road. The George Maddox Farm, Sudler's Conclusion and Waters' River are listed on the National Register of Historic Places.
Wenona is an unincorporated community located on Deal Island in Somerset County, Maryland, United States. It is located at the western end of Maryland Route 363, Deal Island Road.
Hopewell is an unincorporated community in Somerset County, Maryland, United States. It is located at the southern intersection of Maryland routes 413 and 667. St. Peter's Methodist Episcopal Church was listed on the National Register of Historic Places in 1990.
Newport is an unincorporated community in Charles County, Maryland, United States. Sarum was listed on the National Register of Historic Places in 1974. St. Mary's Roman Catholic Church is a historic Roman Catholic church listed on the National Register of Historic Places in 1991.
North Branch is an unincorporated community in Allegany County, Maryland, United States. The Western Maryland Railroad Right-of-Way, Milepost 126 to Milepost 160 was listed on the National Register of Historic Places in 1981.
Iglehart is an unincorporated community in Anne Arundel County, Maryland, United States. Iglehart was listed on the National Register of Historic Places in 1973.
Tracys Landing is an unincorporated community in Anne Arundel County, Maryland, United States. Tracy's Landing Tobacco House No. 2 was listed on the National Register of Historic Places in 1982. The St. James Church was listed on the National Register of Historic Places in 1972.
Glencoe is an unincorporated community in Baltimore County, Maryland, United States. Glencoe was listed on the National Register of Historic Places in 1983.
Jerusalem is an unincorporated community in Harford County, Maryland, United States. It is the location of the historic Jerusalem Mill Village and Jericho Covered Bridge, both listed on the National Register of Historic Places. Jerusalem Mill Village is located on Jerusalem Road in Kingsville, MD between the Little Gunpowder Falls river and Jericho Road.
Earleville is an unincorporated community in Cecil County, Maryland, United States. Earleville is located at the intersection of Maryland Route 282 and Grove Neck Road west of Cecilton.
Antietam is an unincorporated community and census-designated place in Washington County, Maryland, United States. Its population was 89 as of the 2010 census. It is the site of Antietam Iron Furnace Site and Antietam Village, added to the National Register of Historic Places in 1975.
Woodmont is an unincorporated community in Washington County, Maryland, United States. Western Maryland Railroad Right-of-Way, Milepost 126 to Milepost 160 was listed on the National Register of Historic Places in 1980.
Whitehaven is an unincorporated community and census-designated place in Wicomico County, Maryland, United States. Its population was 43 as of the 2010 census. It is part of the Salisbury, Maryland-Delaware Metropolitan Statistical Area.
Mason Springs is an unincorporated community in Charles County, Maryland, United States. Mason Springs is located at the junction of Maryland routes 224 and 225, 1.8 miles (2.9 km) southeast of Potomac Heights. The community had a post office from 1890 to 1924.
United States
Maryland 
Cecil 
