Tilton-Northfield is a census-designated place in the U.S. state of New Hampshire. The population was 3,231 at the 2000 census. The United States Census Bureau uses the CDP designation as a mechanism to report separate population and demographic detail on more densely populated areas within another entity. In this case, Tilton-Northfield is a settled area located within the towns of Tilton and Northfield, New Hampshire which are in Belknap and Merrimack Counties, respectively. Tilton-Northfield apartments for rent comparison page shows most up to date rent information on Tilton-Northfield apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.