Teterboro is a borough in Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 61, a decrease of 6 from the 2010 census count of 67, which in turn reflected an increase of 49 from the 18 counted in the 2000 census. After being ranked as the fourth-smallest municipality, by population, in New Jersey through the 2010 census, the borough is the third-smallest since the merger of Pine Valley into Pine Hill in 2022.