There are 14 US Post Offices in Adams County serving a total of 88,756 residents equating to 6,340 residents per post office. It's estimated that approximately 141,664 packages are handled across the 14 county post offices annually. Adams County is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 101,407. Its county seat is Gettysburg. The county was created on January 22, 1800, from part of York County and named in honor of the second President of the United States, John Adams. On 1\u20133 July 1863, Gettysburg and its vicinity was the site of the pivotal battle of the American Civil War, and as a result is a center for Civil War tourism. Adams County comprises the Gettysburg, PA Metropolitan Statistical Area, which is also included in the Harrisburg-York-Lebanon, PA Combined Statistical Area."