How many people live in Summit County, UT?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 43,100 people living in Summit County, UT. That makes Summit County the 10th-most populous county in Utah. It is home to 1.2% of people living in the state.
43.1K
population of Summit County, UT (2024)
1.2%
County share of the Utah population (2024)
About 43,100 people lived in Summit County, UT in 2024.
Population estimates, 2000–2024
What are Summit County, UT’s age demographics?
About 7,400 Summit County, UT residents are aged 65 and older in 2024. That represents 17.2% of its population. For comparison, the age group represents 12.4% of Utah’s population and 18% in the US overall.
Another 9,200 Summit County residents, or 21.4% of the population, were children under 18. For comparison, the age group represents 26.7% of Utah’s population and 21.6% in the US overall.
A higher share of Summit County, UT's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Summit County, UT’s racial and ethnic demographics?
Non-Hispanic white residents make up 82.6% of the Summit County, UT population, higher than the national share of 57.5%.
In contrast, Summit County’s non-Hispanic Black or African American population accounts for 0.89%, below the 12.6% nationwide, and the Hispanic population makes up 12.2% of the county, compared with 20% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Summit County, UT has a higher share of a non-Hispanic white population than Utah as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Summit County, UT is Park City with about 8,300 residents in 2024.
Cities and towns in Summit County, UT ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Park City (pt.) | 8,278 |
| 2. | Kamas | 2,145 |
| 3. | Francis | 1,857 |
| 4. | Oakley | 1,566 |
| 5. | Coalville | 1,541 |
| 6. | Henefer | 817 |
| 7. | Hideout (pt.) | |
| 8. | Balance of Summit County | 26,905 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
