Damar is a city in Rooks County, Kansas, United States. As of the 2020 census, the population of the city was 112. Damar was established al…Damar is a city in Rooks County, Kansas, United States. As of the 2020 census, the population of the city was 112. Damar was established along the Union Pacific Railroad in 1888 by a community of French Canadian emigres. The community had emigrated from Canada as early as 1871, settling on farms along the Rooks County-Graham County line in northwestern Kansas. According to tradition, the community was named after D.M. Marr, the original owner of the town site.