There are 13 US Post Offices in Tompkins County serving a total of 99,707 residents equating to 7,670 residents per post office. It's estimated that approximately 159,143 packages are handled across the 13 county post offices annually. Tompkins County is a county located in the U.S. state of New York. As of the 2010 census, the population was 101,564. The county seat is Ithaca. The name is in honor of Daniel D. Tompkins, who served as Governor of New York and Vice President of the United States. Tompkins County comprises the Ithaca, NY Metropolitan Statistical Area. It is home to Cornell University, Ithaca College and Tompkins Cortland Community College."