Cost of living in O'Fallon, Missouri
O'Fallon, Missouri has about 93,801 people. Typical rent is $1,443 a month, including utilities, and a typical household earns $110,443 a year. Both figures are Census 2020–2024 medians, not a listing or your pay. This site does not approve or deny benefits. A missing figure stays blank. We do not guess it.
Ranked #63 in Missouri on the 2026 Most Affordable Towns Index.
Simple answer
Typical rent is $1,443 a month.
O'Fallon is a city in Missouri. That rent number includes utilities. A typical household earns $110,443 a year.
- People
- 93,801
- Census average, 2020–2024
- Typical rent
- $1,443
- Median gross rent, includes utilities
- Typical pay
- $110,443
- Median household income, yearly
- Typical home
- $326,200
- Median home value
- 2-bedroom fair rent
- $1,349
- St. Louis, MO-IL HUD Metro FMR Area
O'Fallon, Missouri has about 93,801 people. That count is a 2020–2024 Census average, not a headcount from one day.
A typical home is worth about $326,200.
HUD's fair-market rent for a 2-bedroom in St. Charles County is $1,349 a month. That is the county number, not an apartment listing in O'Fallon. It runs from October 2026 through September 2027.
In the St. Louis, MO-IL metro area, prices sit at 95.1 when the U.S. average is 100. That is a 2024 BEA index.
Missouri taxes wages. A typical combined sales tax is 8.4% as of January 1, 2026. That mix is statewide, not O'Fallon's exact store tax.
Some places in Missouri add a local wage tax. In 2023 the state average was about 0.18% of income. That is not a O'Fallon bill.
In July 2026, a typical Missouri home paid 16.09¢ per kilowatt-hour. That is a state average from EIA, not O'Fallon's bill.
EIA did not publish a 2025 all-grades gas price for Missouri in the table we use.
Among 350 places we list in Missouri with a rent figure, 27 have higher typical rent than O'Fallon.
Nearby places
- Dardenne Prairie
Typical rent $1,444
Compare with O'Fallon - Lake St. Louis
Typical rent $1,588
Compare with O'Fallon - Cottleville
Typical rent $1,624
Compare with O'Fallon - St. Paul
Typical rent $975
Compare with O'Fallon - St. Peters
Typical rent $1,321
Compare with O'Fallon - Weldon Spring
Typical rent $2,800
Compare with O'Fallon - Wentzville
Typical rent $1,345
Compare with O'Fallon - St. Charles
Typical rent $1,251
Compare with O'Fallon
EBT nearby
USDA has a live map of stores that take SNAP. We did not copy that store list here. The downloadable file is a history file for 2005 through 2025, so the live map is the one to use.
Locator page updated 2026-09-11. Last checked 2026-10-16.
Food stamps (SNAP) tools in Missouri
Bigger places in Missouri
Census 2020-2024. HUD rents for October 2026–September 2027. BEA prices for 2024. Taxes as of January 1, 2026. Checked 2026-10-16. 15,000 places are in this guide.