Find duplexes for rent in O'Fallon, MO. When you choose from 1 available listings, you can find a home that combines privacy and affordability. Duplexes offer unique benefits such as separate entrances, private yards, and spacious layouts, making them a great rental choice for anyone seeking a little extra room to spread out. These rentals also provide more privacy and seclusion than apartments, as there are fewer neighboring units. Explore duplex options in O'Fallon on ForRent.com and find your new home today.