A trading card display assembly for securely displaying trading cards includes a plurality of hanger units. Each of the hanger units is removably coupled to a support surface and the hanger units removably engage each other such that the plurality of hanger units forms a single panel on the support surface. A plurality of display units is each removably coupled to a respective one of the hanger units such that each of the display units is retained on the support surfaces. Each of the display units abuts each other on the hanger units such that the plurality of display units defines a single panel on the hanger units. Moreover, each of the display unit has a respective one of a plurality of trading cards positioned therein.