adams_county,_pennsylvania | has to its southeast | carroll_county,_maryland <tsp> 11th_mississippi_infantry_monument | established | 2000 <tsp> adams_county,_pennsylvania | has to its north | cumberland_county,_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 
11th mississippi infantry monument was established in 2000 and is located in adams county pennsylvania. the north of which is which is cumberland county and to its southeast is carroll county. maryland.county county pennsylvania was created in 1800 from part of york county