Barnes
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 0.17
- State:
- Kansas
Barnes is a city located in Washington County, Kansas. Barnes has a 2026 population of 163. Barnes is currently declining at a rate of -1.21% annually and its population has decreased by 0% since the most recent census, which recorded a population of 163 in 2020.