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is a borough in and the county seat of Adams County, Pennsylvania, United States. The population was 7,490 at the 2000 census.
Although known primarily as an attraction because of its proximity to the Gettysburg Battlefield, site of the Battle of Gettysburg, the borough is also known for its institutions of higher learning, namely the Lutheran Theological Seminary, founded in 1826, and Gettysburg College (originally Pennsylvania College), which began operating in 1832.
Many roads radiate from Gettysburg, providing hub-like access to Baltimore (52 miles/84 kilometers), Harrisburg, Pennsylvania (38 miles/61kilometers), Carlisle (30 miles/48 kilometers), Frederick and Hagerstown, Maryland (25 and 30 miles, or 40 and 48 kilometers, respectively), and Washington, D.C. (90 miles/145 kilometers). Chambersburg is west on the Lincoln Highway (U.S. Route 30), the first transcontinental U.S. highway. Today the borough is a 2½ hour drive from Philadelphia and a 3½ hour drive from Pittsburgh via the Pennsylvania Turnpike and U.S. Route 15. Gettysburg Regional Airport, a small general aviation airport, is located 2 miles (4 km) west of Gettysburg.
Gettysburg has seasonal weather that varies from around in the winter months to almost in the summer.