Jefferson County, Idaho

Jefferson County
County
Entering Jefferson County in Grant, Idaho.
Location within the U.S. state of Idaho
Idaho's location within the U.S.
Coordinates: 43°49′N 112°19′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 km^2)
• Land	1,094 sq mi (2,830 km^2)
• Water	12 sq mi (30 km^2)  1.1%
Population  (2020)
• Total	30,891
• Density	28.24/sq mi (10.90/km^2)
Time zone	UTC−7 (Mountain)
• Summer (DST)	UTC−6 (MDT)
Congressional district	2nd
Website	www.co.jefferson.id.us

Jefferson County is a county in the U.S. state of Idaho. As of the 2020 census, 30,891 people lived there.^[1] The county seat and largest city is Rigby.^[2] The county was founded in 1913 and named after Thomas Jefferson,^[3] the 3rd President of the United States (1801–1809).

Communities

Cities

• Hamer
• Lewisville
• Menan
• Mud Lake
• Rigby
• Ririe
• Roberts

Unincorporated communities

• Grant
• Heise
• Monteview
• Terreton

References

1. "QuickFacts: Jefferson County, Idaho". United States Census Bureau. Retrieved September 25, 2023.
2. "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.
3. "Jefferson County". State of Idaho. Archived from the original on 2009-08-15. Retrieved 2009-05-31.