Who moves to O'Fallon, and where they go
Every year the IRS counts how many people move between counties, based on the addresses on their tax returns. Here is what that shows for St. Charles County, MO, home of O'Fallon, between the 2022 and 2023 tax years.
- Moved in
- 17,825from other US counties
- Moved out
- 15,972to other US counties
- Net
- +1,853more arrivals than departures
- From abroad
- 98tax filers and dependents only
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Where newcomers come from
| County | People |
|---|---|
| St. Louis County, MO | 6,788 |
| Lincoln County, MO | 999 |
| St. Louis city, MO (St. Louis) | 910 |
| Warren County, MO | 567 |
| Jefferson County, MO | 417 |
| Madison County, IL | 323 |
| Franklin County, MO | 224 |
| St. Clair County, IL | 208 |
| Boone County, MO (Columbia) | 188 |
| Jackson County, MO (Kansas City) | 148 |
| Maricopa County, AZ (Phoenix) | 140 |
| Cook County, IL (Chicago) | 108 |
Where people go when they leave
| County | People |
|---|---|
| St. Louis County, MO | 4,054 |
| Lincoln County, MO | 1,667 |
| Warren County, MO | 943 |
| St. Louis city, MO (St. Louis) | 703 |
| Jefferson County, MO | 452 |
| Madison County, IL | 264 |
| Franklin County, MO | 261 |
| Boone County, MO (Columbia) | 196 |
| Jackson County, MO (Kansas City) | 181 |
| St. Clair County, IL | 179 |
| Cook County, IL (Chicago) | 121 |
| Dallas County, TX (Dallas) | 114 |
Most moves are short hops within the same metro area. 11,386 of the newcomers came from elsewhere in Missouri and 6,439 from other states. Here are the long-distance moves only, more than 100 miles:
Long-distance newcomers come from
| County | People |
|---|---|
| Jackson County, MO (Kansas City) | 148 |
| Maricopa County, AZ (Phoenix) | 140 |
| Cook County, IL (Chicago) | 108 |
| Greene County, MO (Springfield) | 103 |
| San Diego County, CA (San Diego) | 103 |
| Los Angeles County, CA (Los Angeles) | 81 |
| Johnson County, KS (Overland Park) | 80 |
| Harris County, TX (Houston) | 73 |
Long-distance movers go to
| County | People |
|---|---|
| Jackson County, MO (Kansas City) | 181 |
| Cook County, IL (Chicago) | 121 |
| Dallas County, TX (Dallas) | 114 |
| Collin County, TX (Plano) | 105 |
| Greene County, MO (Springfield) | 103 |
| Maricopa County, AZ (Phoenix) | 99 |
| Camden County, MO | 95 |
| Lee County, FL (Cape Coral) | 91 |
Frequently asked questions
Where do people moving to O'Fallon come from?
Most people moving into St. Charles County, MO come from nearby counties, led by St. Louis County, MO (6,788 people). The biggest source more than 100 miles away is Jackson County, MO.
Where do people leaving O'Fallon move to?
The top destination is St. Louis County, MO (4,054 people). Farther away, the most popular is Jackson County, MO.
Are more people moving to O'Fallon or leaving?
Between the 2022 and 2023 tax years, 17,825 people moved into St. Charles County, MO from elsewhere in the US and 15,972 moved out, a net gain of 1,853 (IRS data, not counting moves from abroad).
Thinking about the move yourself? Compare O'Fallon with any city it trades people with, like O'Fallon vs Kansas City, O'Fallon vs Phoenix, O'Fallon vs Chicago, O'Fallon vs Springfield.
Source: IRS Statistics of Income, county-to-county migration data for filing years 2022 to 2023, the latest available. Counts are people (the number of personal exemptions, which the IRS uses to approximate individuals): tax filers plus dependents whose address moved to a different county between the two filing years. People who do not file returns are not counted, and the IRS hides very small flows to protect privacy. Figures are for the whole county, not just the city of O'Fallon.