County Facts Page ContentAdams County was created on January 22, 1800, from part of York County and was named in honor of President John Adams. Gettysburg, the county seat, was named for James Gettys, a local landowner. Adams County, Pennsylvania is a 5th Class County, the class is determined based upon the county’s population. Three county commissioners are elected for a four year term. There are 21 townships and 13 boroughs. Each one elected its own councilmen or supervisors in their own independent form of government. As of the 2010 census, the population was 101,407. The county has a total area of 522 square miles. Gettysburg is located at the center of Adams County and is the County seat. Known as the largest producer of apples in the Commonwealth, fourth largest producer of apples in the country. Adams County carries the nickname of Apple Capital USA. 20,000 of its acres are dedicated to production of all kinds of fruit. The County is in the watershed of the Chesapeake Bay and is drained by the Susquehanna River and Potomac River. Adams County is on the famous "Mason-Dixon Line" which marked the line between North and South during the Civil War. The County is home of the Gettysburg National Battlefield in the Gettysburg National Military Park. The Battle of Gettysburg, one of the largest battles during the American Civil War, was fought between 1–3 July, 1863 across the fields and heights south of the town of Gettysburg located in the Adams County. On 19 November 1863, President Abraham Lincoln spoke at what is now the Gettysburg National Military Park, located in Gettysburg, Adams County giving is famous "Gettysburg Address. Gettysburg, Adams County was also the home of the 34th President of the United States, Dwight D. Eisenhower. His farmhouse here was the only home he ever owned. The farm was dedicated to the Gettysburg National Military Park and is open to the public.