Epping is a town in Rockingham County, New Hampshire, United States. The population was 7,125 at the 2020 census, up from 6,411 at the 2010 census. The main village, where 2,693 people resided at the 2020 census, is defined by the U.S. Census Bureau as the Epping census-designated place, along New Hampshire Route 27 just west of New Hampshire …Epping is a town in Rockingham County, New Hampshire, United States. The population was 7,125 at the 2020 census, up from 6,411 at the 2010 census. The main village, where 2,693 people resided at the 2020 census, is defined by the U.S. Census Bureau as the Epping census-designated place, along New Hampshire Route 27 just west of New Hampshire Route 125.