Apartments for Rent in O'Fallon, IL

Prices and availability in O'Fallon, IL were last updated on 14 Oct 2026.

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

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

The price range for a studio apartment in O'Fallon, IL is between $1,650 and $1,700.

The price range for a 1-bedroom apartment in O'Fallon, IL is between $1,427 and $2,400.

The price range for a 2-bedroom apartment in O'Fallon, IL is between $1,095 and $3,018.

The price range for a 3-bedroom apartment in O'Fallon, IL is between $1,375 and $2,842.

In O'Fallon 29% of the housing is rented out compared to 71% of homes are owned, according to the most recent Census Bureau estimates. 10% of O'Fallon's apartments are found in large buildings of 50 units or more, 69% are located in smaller apartment complexes with less than 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.