Coyville is a city in Wilson County, Kansas, United States. As of the 2020 census, the population of the city was 60. Coyville was laid out in 188…Coyville is a city in Wilson County, Kansas, United States. As of the 2020 census, the population of the city was 60. Coyville was laid out in 1886 when the Atchison, Topeka and Santa Fe Railway was extended to that point. The town was named for Oscar Coy, a store owner who in 1866 served as the first postmaster.