Migration to and from New Castle County, Delaware
Where New Castle 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
39,894
people moved in (5-yr)
Total outflow
32,221
people moved out (5-yr)
Net migration
+7,673
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Kent County | Delaware | 3,023 |
| Philadelphia County | Pennsylvania | 2,250 |
| Philadelphia City | Philadelphia County, Pennsylvania | 2,250 |
| Delaware County | Pennsylvania | 2,203 |
| Asia | 1,331 | |
| Chester County | Pennsylvania | 1,122 |
| Cecil County | Maryland | 1,114 |
| Sussex County | Delaware | 1,089 |
| Middlesex County | New Jersey | 533 |
| Central America | 504 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Kent County | Delaware | 2,700 |
| Sussex County | Delaware | 1,546 |
| Delaware County | Pennsylvania | 1,426 |
| Chester County | Pennsylvania | 1,241 |
| Cecil County | Maryland | 1,176 |
| Philadelphia County | Pennsylvania | 832 |
| Philadelphia City | Philadelphia County, Pennsylvania | 832 |
| Montgomery County | Pennsylvania | 503 |
| Hillsborough County | Florida | 387 |
| Concord Township | Delaware County, Pennsylvania | 360 |
Explore New Castle County
- Business data for New Castle CountyConstruction sector establishments, employment, payroll
- Cities in DelawareACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in DEGovBids: RFPs, awards, NAICS matching
- New business filings in DelawareNewFilings: 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: 10003.