A universal pedestal mounting assembly includes a lower support structure securable on a supporting surface, an adapter coupled with the lower support structure, and a pedestal tube positioned over the adapter. The adapter is sized corresponding to the pedestal tube. An upper support structure is positioned on the pedestal tube and is configured to secure a component supported on the universal pedestal mounting assembly. A rod is secured between the lower support structure and the upper support structure. The assembly enables pedestal tubes of various sizes to be mounted using the same hardware.