Apartments for Rent in O'Fallon, IL

Prices and availability in O'Fallon, IL were last updated on 11 Aug 2026.

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

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 $2,326.

The price range for a 2-bedroom apartment in O'Fallon, IL is between $1,095 and $2,921.

The price range for a 3-bedroom apartment in O'Fallon, IL is between $1,095 and $2,653.

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 average age of rental buildings in O'Fallon is 20 years old, with 73% being newer apartment buildings completed since 2000. The average height of apartment buildings in the city is 3 stories, of which all are garden-style apartment communities, none are mid-sized buildings, and none are high-rises. These characteristics describe large-scale apartment communities of 50 apartments or more.

Rental apartments in O'Fallon come in a range of sizes and floorplans. Studio apartments represent 1% of units for rent, ideal for singles, renters on a budget and people who value central locations more than space. Rentals with 1-bedroom floorplans make up 37% of the total apartments in the city, while 2-bedroom floorplans represent around 58% of all rentals in O'Fallon. The rest are larger floorplans with 3 bedrooms or more, typically preferred by families, larger households or roommates sharing space.