A paddleboard storage and seat support assembly stores items on a paddleboard, supports a person in an upright seated position on the paddleboard, and provides support for carrying the paddleboard while walking. The assembly includes a panel and a cord having a first end and a second end. Each of the first end and the second end is coupled to a respective end of the panel. Each of a pair of foot straps is couplable to the panel such that respective looped ends of the foot straps are positioned in spaced relationship to the panel for engaging feet of a user while the panel is positioned against a back of the user such that the panel supports the back of the user in an upright seated position.