Abstract: An exemplary magnetic portable electronic device retention system includes a device holder and mounting base. The device holder includes a mating surface with one or more magnets disposed within one or more recesses. The mounting base includes a magnetic portion. The device holder and mounting base are held together by the magnetic attractive force between the magnets and magnetic portion. The attractive force is strong enough to hold the base and holder together during rigorous physical activity, while still being capable of unencumbered manual separation.