Founded in 1841, Adair County is one of 114 counties in the state of Missouri. Historically, Adair County was formed from Macon County. The city of Kirksville is the county seat. With FIPS code of 1, Adair County has a population of 25,185 and area of 568 square miles (1,471 km2).
List of all cities in Adair County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Adair, MO | 63533 | 660 |
| Brashear, MO | 63533 | 660 |
| Connelsville, MO | 63559 | 660 |
| Gibbs, MO | 63540 | 660 |
| Greentop, MO | 63546 | 660 |
| Kirksville, MO | 63501 | 660 |
| Low Ground, MO | 63559 | 660 |
| Martinstown, MO | 63559 | 660 |
| Midland, MO | 63559 | 660 |
| Millard, MO | 63501 | 660 |
| Nind, MO | 63501 | 660 |
| Novinger, MO | 63559 | 660 |
| Pure Air, MO | 63559 | 660 |
| Shibleys Point, MO | 63559 | 660 |
| Sperry, MO | 63501 | 660 |
| Spring Lake, MO | 63501 | 660 |
| Stahl, MO | 63559 | 660 |
| Sublette, MO | 63546 | 660 |
| Willmathsville, MO | 63546 | 660 |
| Yarrow, MO | 63501 | 660 |
| Youngstown, MO | 63559 | 660 |