Utah Counties by Population (2026)

There are 29 counties in Utah.

Salt Lake County is the largest county in the state, with a population of 1,247,734. The most recent census shows that its population has increased by 0.05% 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 : 790,984
• Davis County : 386,550

Utah Counties with the Fewest Residents

The smallest county in Utah is Daggett County , with a population of just 902. This total represents a decrease of 0.1% since the last census count was performed.

Other small counties include:

• Piute County : 1,510
• Wayne County : 2,598
• Rich County : 2,926

Utah Counties with Rapid Growth

Tooele County , with its current population of 89,190, 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 0.19% with 790,984 residents.

On the other hand, Daggett County has had the largest decrease in population, with its 902 current residents totalling 0.1% less than the previous census.