| Jefferson County, OK (ISD) |
| Jefferson County, ID (ISD) |
| Jefferson County, GA (District) |
| Jefferson County, WV (ISD) |
| Jefferson County, IN (ISD) |
| Jefferson County, AL (District) |
| Jefferson County, GA (ISD) |
| Jefferson County, FL (ISD) |
| Jefferson County, CO (ISD) |
| Jefferson County, TN (ISD) |
| Jefferson County, IL (ISD) |
| Jefferson County, PA (ISD) |
| Jefferson County, IA (ISD) |
| Jefferson County, KS (ISD) |
| Jefferson County, WA (ISD) |
