Best SEO and internet marketing services in Tompkins County NY. Tompkins County zip codes - 13062, 13068, 13102, 14850, 14851, 14852, 14853, 14854, 14881 Tompkins County is a county located in the U.S state of New York. The county is located in the west central part of the New Your State. It was founded in 1817. The county was named after Daniel D. Tompkins, who was New York Governor and Vice President of the United States of America. The county’s seat is city of Ithaca and it is also the largest city in the county. The total area of Tompkins County is 492 sq mi (or 1,274 sq km). The land takes 475 sq mi (or 1,230 sq km) and water takes 17 sq mi (or 44 sq km). Population of the county (according to the census in 2010) is 101,564 residents. The density is 214/ sq mi (83/ sq km). There are such colleges and universities (only 3): Cornell University, Ithaca College, Tompkins-Cortland Community College. The county is located in the so-called Finger Lakes region, and some residents say that they live in the Central New York. The median income for a household was little more than $37,000 and the median income for the family in the county was more than $53,000. More than 17% of the population were below the poverty line.