A cap protector includes a unitary rigid shell having an open rear in communication with an interior chamber that is dimensioned and configured to receive the crown portion of a cap. Integrally extending from the lower, front portion of the shell is a substantially planar panel configured to resemble the cap's bill. The panel includes a slot in communication with an interior cavity that is dimensioned to firmly receive the cap bill. On the upper surface of the shell is a grommet with a locking mechanism that grips the cap's crown button.