Atwood is a city in and the county seat of Rawlins County, Kansas, United States. As of the 2020 census, the population of the city was 1,290. I…Atwood is a city in and the county seat of Rawlins County, Kansas, United States. As of the 2020 census, the population of the city was 1,290. In 1875, T.A. Andrews and J.M. Matheny traveled to Rawlins County and started a town site about two miles east of the current city. The city of Attwood was named after Attwood Matheny, the 14-year-old son who accompanied his father on the journey. In 1882, the U.S. Post Office requested permission to drop one "t" thus becoming Atwood. In 1881, Atwood became the county seat of Rawlins County.