Migration to and from Summit County, Colorado
Where Summit County residents came from and where they went over the 5-year window 2016-2020. Census ACS County-to-County Migration Flows, 2020 5-yr (frozen vintage).
Total inflow
3,061
people moved in (5-yr)
Total outflow
3,482
people moved out (5-yr)
Net migration
-421
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Mesa County | Colorado | 341 |
| Eagle County | Colorado | 250 |
| Cheyenne County | Nebraska | 147 |
| Montezuma County | Colorado | 119 |
| Central America | 117 | |
| South America | 116 | |
| Garfield County | Colorado | 114 |
| Palm Beach County | Florida | 108 |
| Adams County | Colorado | 107 |
| San Miguel County | Colorado | 99 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Denver County | Colorado | 345 |
| Boulder County | Colorado | 203 |
| Arapahoe County | Colorado | 160 |
| Dane County | Wisconsin | 146 |
| Madison City | Dane County, Wisconsin | 146 |
| Larimer County | Colorado | 116 |
| Douglas County | Colorado | 111 |
| Hood County | Texas | 103 |
| Hennepin County | Minnesota | 101 |
| Plymouth City | Hennepin County, Minnesota | 101 |
Explore Summit County
- Business data for Summit CountyConstruction sector establishments, employment, payroll
- Cities in ColoradoACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in COGovBids: RFPs, awards, NAICS matching
- New business filings in ColoradoNewFilings: fresh SOS registrations
Methodology
- Counts represent the number of people aged 1+ who reported a different residence at the survey reference date than they did one year earlier, aggregated across the 5-year sample window 2016-2020.
- Outbound (OUT) flows are reported less frequently than inbound (IN) because the survey captures the destination side of each move. Many county pairs have null OUT counts, which is normal.
- "Total inflow" sums the published MOVEDIN counts across all origin counties, including foreign-region inflows (Africa, Asia, Central America, etc.). It is not the same as net population change.
- Frozen vintage. The Census Bureau has not released a newer county-to-county migration flows file. The 2020 5-yr vintage (covering 2016-2020) is the latest available as of build date.
Source: U.S. Census Bureau, American Community Survey, County-to-County Migration Flows: 2016-2020. Vintage: 2020 5-yr. Generated: 2026-05-28. FIPS: 08117.