Summit County, CO Demographics
Summit County, CO is the 19th most populous of 64 counties in Colorado, with 31,055 residents across 608 square miles. That is about 51 people per square mile.
At the 2020 census
| Population | 31,055 |
|---|---|
| Land area | 608 sq mi |
| Density | 51 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Summit County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Summit County, CO
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Summit County, CO — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Summit County, CO
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 1.02 | 5,283 | 27.0 | 196 |
| Census Tract 2.03 | 4,028 | 12.6 | 319 |
| Census Tract 4.05 | 3,809 | 25.8 | 147 |
| Census Tract 4.06 | 2,954 | 22.6 | 131 |
| Census Tract 2.02 | 2,780 | 0.8 | 3,638 |
| Census Tract 3.02 | 2,207 | 100.3 | 22 |
| Census Tract 3.01 | 1,977 | 4.1 | 479 |
| Census Tract 4.04 | 1,861 | 41.6 | 45 |
| Census Tract 4.03 | 1,850 | 35.6 | 52 |
| Census Tract 2.01 | 1,536 | 90.6 | 17 |
| Census Tract 1.01 | 1,416 | 1.5 | 929 |
| Census Tract 1.03 | 1,354 | 245.7 | 6 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Summit County
About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.