The state of Utah is divided into 29 counties. Salt Lake County is the oldest (founded in 1849), while Daggett County is the youngest (established in 1919).

Salt Lake County is the most populous, with a population of 1,029,665. San Juan County has the most land area (20,254 km2), while Davis County has the smallest (774 km2).

Please find a list of all Utah counties arranged alphabetically below.

• Beaver County, UT
• Box Elder County, UT
• Cache County, UT
• Carbon County, UT
• Daggett County, UT
• Davis County, UT
• Duchesne County, UT
• Emery County, UT
• Garfield County, UT
• Grand County, UT
• Iron County, UT
• Juab County, UT
• Kane County, UT
• Millard County, UT
• Morgan County, UT
• Piute County, UT
• Rich County, UT
• Salt Lake County, UT
• San Juan County, UT
• Sanpete County, UT
• Sevier County, UT
• Summit County, UT
• Tooele County, UT
• Uintah County, UT
• Utah County, UT
• Wasatch County, UT
• Washington County, UT
• Wayne County, UT
• Weber County, UT