Founded in 1867, Ellis County is one of 105 counties in the state of Kansas. Historically, Ellis County was formed from unorganized area. The city of Hays is the county seat. With FIPS code of 51, Ellis County has a population of 28,790 and area of 900 square miles (2,331 km2).
List of all cities in Ellis County, KS alphabetically
| City/Town | Postal Code | Area Code |
| Antonino, KS | 67601 | 785 |
| Catharine, KS | 67627 | 785 |
| Ellis, KS | 67637 | 785 |
| Hays, KS | 67601 | 785 |
| Hays, KS | 67667 | 785 |
| Pfeifer, KS | 67660 | 785 |
| Schoenchen, KS | 67667 | 785 |
| Victoria, KS | 67671 | 785 |
| Walker, KS | 67674 | 785 |