National Register of Historic Places listings in Charles County, Maryland

Columns: Name on the Register | Date listed | Location | City or town
15 | Mallows Bay-Widewater Historic and Archeological District | April 24 , 2015 ( # 15000173 ) | Off Charles County shoreline at Sandy Pt . 38°28′21″N 77°16′07″W / 38.4726°N 77.2686°W / 38.4726 ; -77.2686 ( Mallows Bay-Widewater Historic and Archeological District ) | Nanjemoy vicinity | 16 | Marshall Hall | May 12 , 1976 ( # 76000152 ) | 5 miles north of Maryland Routes 210 and 227 38°41′06″N 77°05′55″W / 38.685°N 77.098611°W / 38.685 ; -77.098611 ( Marshall Hall ) | Bryans Road | 17 | Maxwell Hall | July 30 , 1974 ( # 74000949 ) | East of Patuxent on Teagues Point Rd . 38°32′04″N 76°42′01″W / 38.534444°N 76.700278°W / 38.534444 ; -76.700278 ( Maxwell Hall ) | Patuxent | 18 | McPherson 's Purchase | January 3 , 1985 ( # 85000019 ) | Maryland Route 227 38°35′56″N 77°02′51″W / 38.598889°N 77.0475°W / 38.598889 ; -77.0475 ( McPherson 's Purchase ) | Pomfret | 19 | Mount Air | December 22 , 1978 ( # 78001453 ) | West of Faulkner off U.S. Route 301 38°26′12″N 76°59′50″W / 38.436667°N 76.997222°W / 38.436667 ; -76.997222 ( Mount Air ) | Faulkner | 20 | Mount Aventine | April 18 , 1996 ( # 94001328 ) | 1.8 miles southwest of Bryans Rd . on the northwestern side of Chapman 's Landing Rd . 38°37′04″N 77°07′03″W / 38.617778°N 77.1175°W / 38.617778 ; -77.1175 ( Mount Aventine ) | Bryans Road

Example questions:
What year was the Charles County , Maryland place listed on the National Register of Historic Places in Mason 's Springs ? | What is the population of the Charles County , Maryland town that houses the historic Cedar Grove , as of 2010 census ? | How many National Register Historic sites does the Charles County , Maryland city which houses Acquinsicke have ? | What is the population of the Charles County , Maryland town in which the historic Green 's Inheritance is located as of 2010 census ? | What County is the Maryland town that houses the historic Locust Grove the county seat for ?

Answers:
1974 | 8,753 | 4 | 517 | Charles County