adams_county,_pennsylvania | has to its north | cumberland_county,_pennsylvania <tsp> adams_county,_pennsylvania | has to its southwest | frederick_county,_maryland <tsp> 11th_mississippi_infantry_monument | municipality | gettysburg,_pennsylvania <tsp> 11th_mississippi_infantry_monument | location | adams_county,_pennsylvania <sep> adams county is a county in the commonwealth of pennsylvania as of the 2020 census, the population was 103,852 its county seat is gettysburg the county was created on january 22, 1800, from part of york county, and was named for the second president of the united states, john adams on july 1–3, 1863, a crucial battle of the american civil war was fought near gettysburg; adams county as a result is a center of civil war tourism 
the municipality of gettysburg is in adams county of pennsylvania which is located to the south of cumberland county and north east of adams county. it is the location of the 11th mississippi infantry monument.adams county pennsylvania was created on january 22, 1800, from part of york county