Apartments for Rent in O'Fallon, IL

Prices and availability in O'Fallon, IL were last updated on 20 Jul 2026.

The best apartments in O'Fallon, IL are: Thirteen01 at Hartman Lakes, The Oasis at Hartman Lakes, Storyboard on Park Entrance, Parkway Lakeside and Green Mount Lakes.

The average rent in O'Fallon, IL is $1,670.

The price range for a 1-bedroom apartment in O'Fallon, IL is between $1,495 and $2,292.

The price range for a 2-bedroom apartment in O'Fallon, IL is between $1,095 and $2,898.

The price range for a 3-bedroom apartment in O'Fallon, IL is between $1,095 and $2,836.

In O'Fallon, 29% of the residents are renting compared to 71% owning a home, according to data from the U.S. Census Bureau. Large-scale apartment buildings with more than 50 units represent 10% of O'Fallon's rentals, 69% are small-scale complexes with under 50 units, and 17% are single-family rentals.

The age and size of multifamily buildings are among the most visible characteristics of the rental market in a city. In this case, the apartment buildings in O'Fallon are about 20 years old, on average. Of these, 73% have been built since 2000, representing the newer options on the market and typically offering more amenities. Rental buildings in the city have an average height of 3 stories. About all of the rental communities here are low-rise, garden-style communities, none are mid-rises, and none are high-rise buildings. These are true especially for large-scale multifamily buildings with over 50 apartments.

Studio apartments in O'Fallon are around 1% of rentals, while 1-bedroom floor plans represent 37% of the total stock. For those in search of larger rentals, 2-bedroom floorplans make up 58% of all rentals. More generous apartments with 3 bedrooms or more are also available in this city for those in search of more space.