Find an apartment with a yard in O'Fallon, MO and enjoy your own outdoor area. ForRent.com's 127 available rentals with yards provide the perfect space for gardening, letting pets play, or enjoying the fresh air. While many renters love apartment communities for their social environments, everyone needs privacy. When you start your search for O'Fallon apartments with a fenced or private yard, you'll find outdoor space that is all yours.