Migration to and from Ada County, Idaho
Where Ada 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
34,090
people moved in (5-yr)
Total outflow
26,759
people moved out (5-yr)
Net migration
+7,331
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Canyon County | Idaho | 3,357 |
| Orange County | California | 1,192 |
| Bannock County | Idaho | 1,162 |
| Asia | 948 | |
| San Diego County | California | 737 |
| Twin Falls County | Idaho | 734 |
| Sacramento County | California | 642 |
| Los Angeles County | California | 639 |
| Lubbock County | Texas | 553 |
| Elmore County | Idaho | 535 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Canyon County | Idaho | 6,554 |
| Bannock County | Idaho | 934 |
| Bonneville County | Idaho | 700 |
| Elmore County | Idaho | 560 |
| King County | Washington | 508 |
| San Diego County | California | 440 |
| Valley County | Idaho | 431 |
| Kootenai County | Idaho | 422 |
| Coconino County | Arizona | 411 |
| Clark County | Nevada | 380 |
Explore Ada County
- Business data for Ada CountyConstruction sector establishments, employment, payroll
- Cities in IdahoACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in IDGovBids: RFPs, awards, NAICS matching
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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: 16001.