Phillips County is a county located in the U.S. state of Kansas. Its county seat and largest city is Phillipsburg. As of the 2020 census, the county population was 4,981. The county was named after William Phillips, a free-state abolition journalist and colonel in the American Civil War.

Phillipsburg is a city in, and the county seat of, Phillips County, Kansas, United States. As of the 2020 census, its population was 2,337.