An off-road vehicle has a frame, at least four wheels, each including a tire, a seat, a steering assembly, an engine, and a cargo box pivotally mounted to the frame rearwardly of the seat. The cargo box includes a cargo box body having a front wall, a pair of side walls extending from the front wall, a first floor connected to a lower end of the front and the pair of side walls, and an at least partially opened rear side. A second floor is supported inside the cargo box body above the first floor. At least one tailgate selectively closes the at least partially opened rear side.