Migration to and from Grundy County, Iowa
Where Grundy 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
668
people moved in (5-yr)
Total outflow
1,162
people moved out (5-yr)
Net migration
-494
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Black Hawk County | Iowa | 221 |
| Tama County | Iowa | 94 |
| Dallas County | Iowa | 62 |
| Butler County | Iowa | 55 |
| Europe | 35 | |
| Fayette County | Iowa | 29 |
| Marshall County | Iowa | 23 |
| Pierce County | Washington | 22 |
| Cook County | Illinois | 20 |
| Maricopa County | Arizona | 12 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Black Hawk County | Iowa | 536 |
| Marshall County | Iowa | 87 |
| Polk County | Iowa | 78 |
| Columbia County | Wisconsin | 38 |
| Columbus City | Columbia County, Wisconsin | 38 |
| Johnson County | Iowa | 36 |
| Dane County | Wisconsin | 36 |
| Madison Town | Dane County, Wisconsin | 36 |
| Tama County | Iowa | 34 |
| Webster County | Iowa | 29 |
Explore Grundy County
- Business data for Grundy CountyConstruction sector establishments, employment, payroll
- Cities in IowaACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in IAGovBids: RFPs, awards, NAICS matching
- New business filings in IowaNewFilings: 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: 19075.