O'Fallon, MO Cost Of Living

Demographics | Crime | Cost Of Living
Updated: 2025-10-24

Cost Of Living In O'Fallon, MO Summary

Cost of living in O'Fallon research summary. The cost of living index is set to 100 for the average place in the United States. A cost of living index above 100 means O'Fallon is expensive. An index value below 100 means the city is a relatively cheap place to live.

On a city-by-city basis in Missouri, home prices and rent have the biggest impact on the cost of living. Here are the key takeaways based on Saturday Night Science:

  • The cost of living index in O'Fallon is 105, with 100 being the average.

  • The cost of living index in O'Fallon is 1.1x higher than the national average.

  • O'Fallon ranks as the #120 cheapest in Missouri out of 142.

  • O'Fallon ranks as the #3,177 cheapest out of 6,489 in the US.

  • The median home value in O'Fallon is $370,197.

  • The median income in O'Fallon is $107,203.

Table Of Contents

  1. Summary
  2. National Comparison
  3. Housing Breakdown
  4. Detailed Pricing
  5. Nearby Comparisons
105
O'Fallon's Overall Cost Of Living
1.1x
Higher Than The National Average

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 88.

The standard of living in O'Fallon ranks as #120 most affordable out of the 142 places we measured in Missouri. By definition, that implies O'Fallon ranks as the #22 most expensive place in the Show Me State.

For more reading on life in O'Fallon, check out:

120 out of 142
In Missouri
3,177 out of 6,489
In America

O'Fallon Cost Of Living Vs. Missouri

Six factors go into calculating the cost of living index in O'Fallon. Here is how it fairs on each of the criteria:

  • The Services index in O'Fallon is 93.

  • The Groceries index in O'Fallon is 96.

  • The Health index in O'Fallon is 90.

  • The Housing index in O'Fallon is 126.

  • The Transportation index in O'Fallon is 94.

  • The Utilities index in O'Fallon is 103.

Living Expense O'Fallon Missouri National Average
Overall 105 88 100
Services 93 93 100
Groceries 96 96 100
Health 90 91 100
Housing 126 78 100
Transportation 94 90 100
Utilities 103 99 100
For more reading on cost of living around Missouri, check out:
O'Fallon Cost of Living Vs. MO

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 2019-2023. The key points are:

  • The Median Home Value in O'Fallon is $370,197.

  • The Median Rent in O'Fallon is $1,400.

  • The Median Income in O'Fallon is $107,203.

  • The Home Value To Income in O'Fallon is 3.5x.

  • The Rent To Monthly Income in O'Fallon is 0.16x.

Statistic O'Fallon Missouri United States
Median Home Value $370,197 $257,929 $303,400
Median Rent $1,400 $996 $1,348
Median Income $107,203 $68,920 $78,538
Home Value To Income 3.5x 3.7x 3.9x
Rent To Monthly Income 0.16x 0.17x 0.21x
$370,197
Median Home Value
$1,400
Median Rent
$107,203
Median Income

O'Fallon, MO Costs By Category

Detailed O'Fallon Services Costs Vs. Missouri

Item O'Fallon Missouri
Shampoo $1.11 $1.28
Movie $11.28 $12.13
Bowling $16.92 $18
Haircut $21.19 $24.26
Beauty Salon $40.57 $45.56

Detailed O'Fallon Groceries Costs Vs. Missouri

Item O'Fallon Missouri
Ground Beef $6.4 $5.84
Fried Chicken $1.36 $1.57
Milk $4.5 $4.67
Potatoes $5.28 $4.93
Pizza $10.84 $12.09
Beer $9.47 $10.41
Toothpaste $3.75 $3.7

Detailed O'Fallon Health Costs Vs. Missouri

Item O'Fallon Missouri
Optometrist $125.72 $125.68
Doctor $124.51 $135.78
Dentist $100.78 $113.29

Detailed O'Fallon Transportation Costs Vs. Missouri

Item O'Fallon Missouri
Gasoline $3.2 $3.46
Tire Balancing $50.0 $59.92

Detailed O'Fallon Utilities Costs Vs. Missouri

Item O'Fallon Missouri
All Electricity $133.84 $193.99
Phone $188.69 $192.25

O'fallon SnackAbility

9
/10
Overall SnackAbility
Jobs
8.5/10
Housing
8.5
Affordability
8.5
Diversity
6
Safety
8
Amenities
9
Education
8.5
Commute
6

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 96, 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 104, 1.0x O'Fallon.

City Population Cost Of Living Vs. O'Fallon
St. Peters, MO 58,200 96 0.9x
Chesterfield, MO 49,591 121 1.2x
Wentzville, MO 45,734 104 1.0x
Wildwood, MO 35,168 124 1.2x
Ballwin, MO 30,835 109 1.0x
Creve Coeur, MO 18,643 130 1.2x
Manchester, MO 18,189 102 1.0x
Lake St. Louis, MO 17,538 109 1.0x
Dardenne Prairie, MO 13,137 113 1.1x
Town and Country, MO 11,605 161 1.5x

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