Summit County's 2026 population is estimated at 31,391, reflecting a -0.4% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Summit County is the 20th largest county in Colorado. The 2010 population was 28,075 and has grown 11.81% since 2010.
Overall: 39.5 years
Female: 39.7 years
Male: 39.3 years
There are 25,971 adults, (4,874 of whom are seniors) in Summit County.
Female: 13,873 (44.7%)
Male: 17,144 (55.3%)
The racial composition of Summit County includes 76.48% White, and smaller percentages for Asian, other race, Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 23,723 | 76.48% |
| Two or more races | 6,038 | 19.47% |
| Asian | 486 | 1.57% |
| Other race | 407 | 1.31% |
| Black or African American | 129 | 0.42% |
| Native Hawaiian or Pacific Islander | 122 | 0.39% |
| Native American | 112 | 0.36% |
Summit County 's average per capita income is $57,099. Household income levels show a median of $109,773. The poverty rate stands at 7.69%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $158,203 | - |
| Families | $138,295 | $171,403 |
| Households | $109,773 | $147,734 |
| Non Families | $73,183 | $117,299 |
Average Income
Median Household Income
Poverty Rate