Abstract: A license plate holder for providing a weather-proof and tamper-proof enclosure for a vehicle license plate includes a backing plate adapted to be secured to the vehicle license plate mount and to have the license plate secured thereto. A cover frame is secured to the backing plate by means of tamper-resistant screws secured between the backing plate and frame without passing through the license plate or a transparent pane held against the license plate by the frame. Gaskets provide weather-proof seals between the frame and pane and between the license plate and pane. The tamper-resistant screws are received in cylindrical female-threaded fasteners which are crimped in place to determine the spacing between the frame and backing plate. The backing plate is provided with four mounting apertures corresponding to four standardly spaced mounting holes in the vehicle license plate mount.