| Index | O'Fallon | Illinois | National |
| Cost of living | 106 | 98 | 100 |
| Groceries | 100 | 100 | 100 |
| Health care | 98 | 100 | 100 |
| Housing | 121 | 95 | 100 |
| Transportation | 100 | 101 | 100 |
| Utilities | 102 | 99 | 100 |
| Lifestyle & Entertainment | 97 | 100 | 100 |
| Household Items | 98 | 100 | 100 |
| Education & Childcare | 99 | 100 | 100 |
Understanding the cost of living in O'Fallon can help future residents assess whether their current financial situation aligns with the expenses they will encounter. It enables them to plan for potential changes in their budget and lifestyle. The O'Fallon cost of living index is 106, which is 6% higher than the national average. The cost of living index is calculated by taking into account multiple categories, which encompass both the cost of everyday expenditures and larger expenses as well.
The cost of living in O'Fallon is about average when compared to all other cities across the nation. You can expect that everyday items like food, household expenses and utility bills will be no more expensive than any other average city. Residents can anticipate living expenses that remain in line with the national average, ensuring a manageable financial burden, making it an attractive choice for those seeking affordability without the constraints of higher everyday expenditures.
Housing costs are a major factor in the O'Fallon cost of living index, and they often eat up a big chunk of your take-home pay. Unfortunately, in this area, housing expenses for both homeownership and rentals were 20.9% higher than what's typical in an average city. That includes the prices of homes and rents, as well as mortgage rates and insurance.
Wondering if O'Fallon is affordable? It's a question that often comes up when you're thinking about a new city since affordability can really shape your decisions. The cost of living index (covered earlier), housing expenses and income levels all play a part in the affordability equation. In O'Fallon, for example, the median home price is 21.1% higher than what folks pay nationally, and monthly rent is 20.4% higher than the usual rates. Plus, income levels matter too, with O'Fallon boasting a median household income of $132,987, which is 63.5% higher than the national average.
Urbanization: Urban areas with a wealth of amenities and employment opportunities tend to come with a higher price tag for living. Why? Well, more people want to be there, which drives up home prices and rents. On the flip side, less densely populated rural areas or places where there's not as much demand usually mean fewer attractions, things to do and slower job growth. That often results in a lower cost of living.
Transportation: When public transportation options are limited or non-existent, residents frequently resort to vehicle ownership, which can significantly contribute to the overall cost of living. Monthly financial obligations encompass fuel, insurance, regular maintenance and potentially lease or financing expenses. In O'Fallon, the transportation index is 0.2% higher than the national average.
Utilities: As with the prices of anything else, utility costs can exhibit significant variations, contingent on factors like climate, energy source availability, geographic location and state regulations. The expenses associated with electricity, water, heating, and waste disposal can fluctuate, either upward or downward, depending on the particular city or state. In O'Fallon, the utilities index registers 1.6% higher than the national average.
The cost of living data for O'Fallon shown above is based on a U.S. average baseline score of 100, making it easier to compare how far your dollar may go from one city to another. Housing uses U.S. Census home price and rental data, while all remaining values are AI-assisted estimates informed by regional pricing, climate, transportation dynamics, and local economic factors. These scores are best used for directional comparisons between cities.
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| Median Income | Per Year | Per Month | Max Budget (28% DTI) | Max Budget (36% DTI) |
| Owners | $161,488 | $13,457 | $3,768 | $4,845 |
| Renters | $75,154 | $6,263 | $1,753 | $2,255 |
| State | General Sales Tax | With Max Surtax |
| Illinois | 6.25% | 10.25% |
| State | Income Tax (Low) | Income Tax (High) |
| Illinois | 4.95% | 4.95% |
| City | Population | Cost of Living Index | National Avg. |
| Rentchler, IL | 4 | 99 | 1.4% |
| Brooklyn, IL | 445 | 74 | 26.2% |
| East St. Louis, IL | 27,033 | 77 | 22.5% |
| Alorton, IL | 2,149 | 78 | 22.3% |
| Centreville, IL | 5,098 | 78 | 22.0% |
| O'Fallon, IL | 30,151 | 106 | 5.8% |
| City | Population | Cost of Living Index | National Avg. |
| Southgate, MI | 30,149 | 92 | 8.3% |
| Raytown, MO | 30,162 | 89 | 11.3% |
| Maryville, TN | 30,172 | 100 | 0.4% |
| Oak Park, MI | 30,129 | 94 | 5.9% |
| Jamestown, NY | 30,127 | 83 | 17.3% |
| O'Fallon, IL | 30,151 | 106 | 5.8% |
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