Claremore is a city in and the county seat of Rogers County in northeastern Oklahoma, United States. Its population was 19,580 at t…Claremore is a city in and the county seat of Rogers County in northeastern Oklahoma, United States. Its population was 19,580 at the 2020 census, a 5.4$ increase over the 18,581 recorded in 2010. Located in the foothills of the Ozark Mountains, it is home of Rogers State University, and is part of the Tulsa metropolitan area.