What is the cost of living in O'Fallon, MO?
According to the most recent data on the cost of living, O'Fallon has an overall cost of living index of 105, which is 1.1x higher than the national index of 100.
Compared to Missouri, O'Fallon has a cost of living index that's 1.2x higher than Missouri's index of 90.
The standard of living in O'Fallon ranks as #118 most affordable out of the 144 places we measured in Missouri. By definition, that implies O'Fallon ranks as the #26 most expensive place in the Show Me State.
For more reading on life in O'Fallon, check out:
O'Fallon Cost Of Living Vs. Missouri
Six factors go into calculating the cost of living index in O'Fallon. Here is how it fares on each of the criteria:
The Services index in O'Fallon is 93.
The Groceries index in O'Fallon is 97.
The Health index in O'Fallon is 127.
The Housing index in O'Fallon is 95.
The Transportation index in O'Fallon is 93.
The Utilities index in O'Fallon is 96.
| Living Expense | O'Fallon | Missouri | National Average |
|---|---|---|---|
| Overall | 105 | 90 | 100 |
| Services | 93 | 97 | 100 |
| Groceries | 97 | 98 | 100 |
| Health | 127 | 76 | 100 |
| Housing | 95 | 95 | 100 |
| Transportation | 93 | 94 | 100 |
| Utilities | 96 | 96 | 100 |
O'Fallon Cost Of Living Compared To Missouri Averages
Index where 100 = national average. Source: cost-of-living index 2026.
For more reading on cost of living around Missouri, check out:
Protect your home budget Compare home warranties in O'Fallon Get matched →Source: Cost-of-living index 2026, normalized to US average = 100
O'Fallon, MO Housing Cost Breakdown
Housing swings affordability the most between places in Missouri, so we broke down housing costs into more detail. Home and income data comes from the most recent US Census ACS 2020-2024. The key points are:
The Median Home Value in O'Fallon is $376,395.
The Median Rent in O'Fallon is $1,443.
The Median Income in O'Fallon is $110,443.
The Home Value To Income in O'Fallon is 3.4x.
The Rent To Monthly Income in O'Fallon is 0.16x.
O'Fallon, MO Costs By Category
Detailed O'Fallon Services costs vs. Missouri
Detailed O'Fallon Groceries costs vs. Missouri
Detailed O'Fallon Health costs vs. Missouri
Detailed O'Fallon Transportation costs vs. Missouri
O'fallon SnackAbility
Cost Of Living In Cities Around O'Fallon
The cost of living varies in the cities and towns around O'Fallon. Here's a quick look at the cost of living in the most populous nearby places:
St. Peters, MO has a cost of living index of 97, 0.9x O'Fallon.
Chesterfield, MO has a cost of living index of 121, 1.2x O'Fallon.
Wentzville, MO has a cost of living index of 105, 1.0x O'Fallon.
| City | Population | Cost Of Living | Vs. O'Fallon |
|---|---|---|---|
| St. Peters, MO | 59,092 | 97 | 0.9x |
| Chesterfield, MO | 49,574 | 121 | 1.2x |
| Wentzville, MO | 47,061 | 105 | 1.0x |
| Wildwood, MO | 35,133 | 122 | 1.2x |
| Ballwin, MO | 31,279 | 109 | 1.0x |
| Creve Coeur, MO | 18,643 | 135 | 1.3x |
| Manchester, MO | 18,160 | 106 | 1.0x |
| Lake St. Louis, MO | 18,066 | 109 | 1.0x |
| Dardenne Prairie, MO | 13,503 | 115 | 1.1x |
| Town and Country, MO | 11,607 | 168 | 1.6x |
