Find 19 one-bedroom apartments in O'Fallon on ForRent.com. One-bedroom apartments are great for those looking for a private and manageable space. While these rentals may offer less storage and living space, they are often less costly with lower rent and utility bills. With access to shared amenities like pools and fitness centers, O'Fallon one-bedroom apartments provide privacy while maintaining access to community and convenience. Start your search on ForRent.com and find 19 one-bedroom options in O'Fallon. See 19 apartments for rent under $1,200 in O'Fallon, MO. On ForRent.com, we're here to help you find a home that fits your budget without sacrificing your apartment must-haves. As you explore O'Fallon apartments under $1,200, remember to consider the amenities and location that matter most to you. This will ensure you find a place that's not only budget-friendly but also perfectly suited to your lifestyle. Start your apartment search and take the first step towards finding your new home today.