Apartments for Rent in O'Fallon, MO

Prices and availability in O'Fallon, MO were last updated on 2 Oct 2026.

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

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 $2,032.

The price range for a 2-bedroom apartment in O'Fallon, MO is between $1,133 and $2,634.

The price range for a 3-bedroom apartment in O'Fallon, MO is between $1,400 and $3,033.

In O'Fallon, 18% of the residents are renting compared to 82% 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, 59% are small-scale complexes with under 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.

Studio apartments in O'Fallon are around 1.0% of rentals, while 1-bedroom floor plans represent 35% of the total stock. For those in search of larger rentals, 2-bedroom floorplans make up 56% of all rentals. More generous apartments with 3 bedrooms or more are also available in this city for those in search of more space.