House Prices

House Prices & Home Values O Fallon, IL 2026


Average Data

average house price$292,100
average size per house2908 ft²
average price per ft²101 $ / ft²

04/21/2026 - The value range (VR) for house prices in O Fallon, IL is $90/ sqft to $90/ sqft. An average home with 2908 sqft costs approximately $261,720 to $261,720. O Fallon, IL includes 1 ZIP codes and it is located in St. Clair county. The lowest prices are found in ZIP 62269, while the highest are in ZIP 62269. The average price per sqare feet is $101. Our analysis is based on 13 property listings.

Avergage prices by ZIP codes O Fallon

6226999 $ / ft²




Historical development of home values in O Fallon

Year Estimated value (USD) Change vs. 2025
2010 $135,657 -53.6%
2011 $130,411 -55.4%
2012 $130,060 -55.5%
2013 $134,921 -53.8%
2014 $141,630 -51.5%
2015 $148,899 -49.0%
2016 $156,669 -46.4%
2017 $165,125 -43.5%
2018 $174,254 -40.3%
2019 $182,334 -37.6%
2020 $191,760 -34.4%
2021 $218,106 -25.3%
2022 $254,263 -13.0%
2023 $268,132 -8.2%
2024 $283,644 -2.9%
2025 $292,100 0.0%

Graph: estimated home values in O Fallon over time (USD)



Example: 100% financing house in O Fallon

Loan amount: $292,100

Interest rate: 6.00%

Fixed monthly payment: $1,751.29

Breakdown in the 1st month:
Interest portion: $1,460.50  –  Principal portion: $290.79

Yearly breakdown (100% financing)

Year Interest per year ($) Principal per year ($) Remaining balance at year-end ($)
1 $17,428.42 $3,587.02 $288,512.98
2 $17,207.18 $3,808.26 $284,704.72
3 $16,972.30 $4,043.15 $280,661.57
4 $16,722.93 $4,292.52 $276,369.05
5 $16,458.17 $4,557.27 $271,811.78
6 $16,177.09 $4,838.36 $266,973.42
7 $15,878.67 $5,136.77 $261,836.65
8 $15,561.85 $5,453.60 $256,383.05
9 $15,225.48 $5,789.97 $250,593.08
10 $14,868.37 $6,147.08 $244,446.00
11 $14,489.23 $6,526.22 $237,919.79
12 $14,086.71 $6,928.74 $230,991.05
13 $13,659.36 $7,356.09 $223,634.96
14 $13,205.65 $7,809.80 $215,825.16
15 $12,723.96 $8,291.49 $207,533.67
16 $12,212.56 $8,802.89 $198,730.79
17 $11,669.61 $9,345.83 $189,384.96
18 $11,093.18 $9,922.26 $179,462.69
19 $10,481.20 $10,534.24 $168,928.45
20 $9,831.47 $11,183.97 $157,744.48
21 $9,141.67 $11,873.78 $145,870.70
22 $8,409.32 $12,606.13 $133,264.57
23 $7,631.80 $13,383.64 $119,880.93
24 $6,806.33 $14,209.12 $105,671.81
25 $5,929.94 $15,085.50 $90,586.31
26 $4,999.50 $16,015.95 $74,570.36
27 $4,011.67 $17,003.77 $57,566.59
28 $2,962.92 $18,052.53 $39,514.06
29 $1,849.47 $19,165.97 $20,348.09
30 $667.36 $20,348.09 $0.00

Note: The calculation is based on a standard annuity mortgage with a fixed monthly payment over the entire term. Extra payments, interest rate changes, and additional purchase costs (e.g. taxes, notary fees) are not included.


How to sell in O Fallon, IL


1500 sqft3900 sqft
Ø selling price$183,316$389,962
Ø fast selling$166,650$350,965
Ø high price sale$199,981$428,958

In 2026, houses in O Fallon, IL will be offered at an average price of $101 per square foot. A 1,500 sqft home priced at $183,316 is 25.07% more expensive per square foot than a 3,900 sqft home priced at $389,962. Home prices in O Fallon, IL vary significantly depending on the neighborhood and location. For a quick sale, a 2,700 sqft home should be listed at around $269,973. Sellers who can wait longer may achieve a higher price of up to $329,967.

FAQ – Home Values in O Fallon

What is the median home value in O Fallon in 2026?

In 2026, the typical home value in O Fallon is about $292,100 for an average home size of 2908 square feet. This corresponds to an average price of roughly $101 per square foot.

What is the average cost per square foot in O Fallon?

In 2026, homes in O Fallon sell for an average of around $101 per square foot, with a typical range between $90 and $90 per square foot, depending on the property’s location, condition, and lot size.

What is the average home size in ?

The average home size in O Fallon is about 2908 square feet, with an estimated 2026 value around $292,100.



Locations close to O Fallon, IL

Okawville, IL64 $ / ft²
Percy, IL129 $ / ft²
Pierron, IL67 $ / ft²
Oakdale, IL91 $ / ft²
New Memphis, IL98 $ / ft²
New Baden, IL121 $ / ft²
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