Apartments for Rent in O'Fallon, MO

Prices and availability in O'Fallon, MO were last updated on 24 Jun 2026.

The best apartments in O'Fallon, MO are: Casalon Parkway Apartments, Bramblett Hills, Enclave at Winghaven, Westchester Village 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 $931 and $1,954.

The price range for a 2-bedroom apartment in O'Fallon, MO is between $1,022 and $2,670.

The price range for a 3-bedroom apartment in O'Fallon, MO is between $1,100 and $3,080.

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.

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.