Utah Counties by Population (2025)

There are 29 counties in Utah.

Salt Lake County is the largest county in the state, with a population of 1,232,004. The most recent census shows that its population has increased by 0.04% since the previous census.

A number of other Utah counties also boast relatively large populations for their state, though not able to match the density of Salt Lake County:

• Utah County : 769,109
• Davis County : 382,510

Utah Counties with the Fewest Residents

The smallest county in Utah is Daggett County , with a population of just 929. This total represents a decrease of 0.0% since the last census count was performed.

Other small counties include:

• Piute County : 1,522
• Wayne County : 2,603
• Rich County : 2,839

Utah Counties with Rapid Growth

Tooele County , with its current population of 86,839, has shown the largest population growth, with an increase of 0.2% since the last census.

Utah County has also had relatively high population growth of 0.16% with 769,109 residents.

On the other hand, Daggett County has had the largest decrease in population, with its 929 current residents totalling 0.0% less than the previous census.