An skateboard security rack having a pair of support members defining a slot therebetween for receiving the deck of a skateboard. At least one of the support members has a width smaller than the wheelbase of the skateboard received in the slot. Locking structure between the support members and across the top of the slot retains the skateboard within the slot. The locking structure may be separate elements coupled to each of the support members and a lock therebetween. Alternatively, the locking structure may be a lock such as a conventional U-shape lock. If separate elements coupled to each of the support members are used, they may be fixed in place, or movable such as longitudinally slideable along the support members. The support members may be elongated hollow or solid members, or formed in panels. The support members are desirably hollow tubes bent into inverted U-shapes. Bases of the support members may be mounted to a variety of base surfaces such as flat or curvilinear, horizontal or vertical. For instance, the bases may be bolt mounted to or embedded in a horizontal concrete sidewalk. Multiple support members can be mounted in sequence to provide an array of slots. The bases of a number of the support members can be shared or connected to provide modular structures that facilitate installation.