Mechanicsville is an unincorporated community and census-designated place in St. Mary's County, Maryland, United States.

[2] It is adjacent to the community of Charlotte Hall, which is known for its agriculture, Amish population, and the Maryland Veterans Home.

The Amish people had their own system of one room schoolhouses there and a school year that better accommodated the farm season.

[6] Maryland provided a place for the Lancaster Amish to escape these pressures and, as historian Karen Johnson-Weiner described, avoid “what they saw as a threat to their religious identity”.

[7] Population by race[7] Ethnic heritageIrish 33.3%, German 32.4%, French (except Basque) 16.6%, English 13.9%, Polish 9.5%, African-American 5.9%, Italian 5.4%, Scottish 1.5%, Norwegian 0.8%, American Indian 0.5%.

[7] Income and education[7] The climate in this area is characterized by hot, humid summers and generally cool to cold winters.