Kentland is a town in Jefferson Township, Newton County, in the U.S. state of Indiana. The population was 1,641 at the 2020 census. The town was founded in 1860 as "Kent", though this name was soon lengthened to Kentland. The name honors Alexander J. Kent, who acquired the then marshy plat and prepared it for development. The town is the county …Kentland is a town in Jefferson Township, Newton County, in the U.S. state of Indiana. The population was 1,641 at the 2020 census. The town was founded in 1860 as "Kent", though this name was soon lengthened to Kentland. The name honors Alexander J. Kent, who acquired the then marshy plat and prepared it for development. The town is the county seat of Newton County.