Jefferson County | |
|---|---|
 Entering Jefferson County in Grant, Idaho. | |
 Seal | |
 Location within the U.S. state of Idaho | |
 Idaho's location within the U.S. | |
| Coordinates: 43°49′N 112°19′W / 43.82°N 112.31°W | |
| Country |  United States |
| State |  Idaho |
| Founded | February 18, 1913 |
| Named for | Thomas Jefferson |
| Seat | Rigby |
| Largest city | Rigby |
| Area | |
• Total | 1,106 sq mi (2,860 km2) |
| • Land | 1,094 sq mi (2,830 km2) |
| • Water | 12 sq mi (30 km2) 1.1% |
| Population (2020) | |
• Total | 30,891 |
• Estimate (2023) | 34,198  |
| • Density | 28/sq mi (11/km2) |
| Time zone | UTC−7 (Mountain) |
| • Summer (DST) | UTC−6 (MDT) |
| Congressional district | 2nd |
| Website | www |
Jefferson County is a county located in the U.S. state of Idaho. As of the 2020 Census, the county's population was 30,891.[1] The county seat and largest city is Rigby.[2] The county was established in 1913 and named after Thomas Jefferson, the third U.S. President.[3] Jefferson County is part of the Idaho Falls, ID Metropolitan Statistical Area.
- ^ 2020 Census, US Census Bureau, Jefferson County, Idaho Profile
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ "Jefferson County". State of Idaho. Archived from the original on August 15, 2009. Retrieved May 31, 2009.