Market insights · Colorado
Summit County, CO: growth, migration and housing
Summit County has 31,517 residents, up 0.9% since 2020 (-0.4% in the last year). In 2022–2023, 1,692 households moved in and 1,853 moved out (-161 net), bringing in a net $26.9M of income. Median household income is $109,773, the median home $939,900 and median rent $1,928 a month.
In Colorado: 38th of 64 counties for 5-year population growth · 51st of 60 counties for net in-migration (per resident) · 5th of 64 counties for median household income · 2nd of 64 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Summit County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Denver County, CO | 183 | $34.4M |
| Jefferson County, CO | 93 | $15.7M |
| Boulder County, CO | 50 | $7.0M |
| Eagle County, CO | 42 | $2.9M |
| Arapahoe County, CO | 41 | $5.2M |
| Douglas County, CO | 35 | $9.8M |
| Maricopa County, AZ | 31 | $3.2M |
| El Paso County, CO | 31 | $2.9M |
Where leavers went
Top counties by households leaving Summit County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Denver County, CO | 161 | $24.7M |
| Jefferson County, CO | 122 | $14.0M |
| Arapahoe County, CO | 66 | $9.2M |
| Grand County, CO | 58 | $5.0M |
| Park County, CO | 51 | $4.0M |
| Boulder County, CO | 41 | $4.9M |
| Lake County, CO | 41 | $2.0M |
| Larimer County, CO | 39 | $3.2M |
BizyFi in Summit County
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.