Apartments for Rent in O'Fallon, MO

Prices and availability in O'Fallon, MO were last updated on 3 Aug 2026.

The best apartments in O'Fallon, MO are: Casalon Parkway Apartments, Thornwood Apartments, Bramblett Hills, Westchester Village and Enclave at Winghaven.

The average rent in O'Fallon, MO is $1,483.

The price range for a 1-bedroom apartment in O'Fallon, MO is between $988 and $2,053.

The price range for a 2-bedroom apartment in O'Fallon, MO is between $1,126 and $2,596.

The price range for a 3-bedroom apartment in O'Fallon, MO is between $1,500 and $2,879.

In O'Fallon 18% of the housing is rented out compared to 82% 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, 59% are located in smaller apartment complexes with less than 50 units, and 24% are single-family rentals.

The average age of rental buildings in O'Fallon is 20 years old, with 78% 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 1.0% 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 35% of the total apartments in the city, while 2-bedroom floorplans represent around 56% 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.