The deep fascia of the foot lies beneath the subcutaneous tissue and surrounds the intrinsic foot muscles. Depending on its location, the composition of the deep fascia varies. In some areas it is thin, while in other areas it is greatly thickened to form retinacula and the plantar aponeurosis. Selected clinical considerations that relate to the deep fascia of the foot are described. These include the following: plantar fasciitis, infection, compartment syndrome, calcaneal fracture, and neuroma.