Founded in 1867, Harper County is one of 105 counties in the state of Kansas. Historically, Harper County was formed from unorganized area. The city of Anthony is the county seat. With FIPS code of 77, Harper County has a population of 5,331 and area of 802 square miles (2,077 km2).
List of all cities in Harper County, KS alphabetically
| City/Town | Postal Code | Area Code |
| Anthony, KS | 67003 | 620 |
| 67150 | 620 | |
| Attica, KS | 67009 | 620 |
| Bluff City, KS | 67018 | 620 |
| Danville, KS | 67036 | 620 |
| Duquoin, KS | 67058 | 620 |
| Freeport, KS | 67049 | 620 |
| Harper, KS | 67058 | 620 |
| Waldron, KS | 67150 | 620 |