Abstract: A portable stadium seat having a base and a back for use on bleacher or hard plastic seating is disclosed which has heated seat and backrest members and a self-contained, rechargeable electrical power source for operating an electrical heating element contained in each of the seat and backrest members. The backrest member is hingedly mounted on the seat member, such that it may be folded flat onto the seat member for ease of portability and storage, and the portable heated stadium seat includes a carrying strap to enhance the portability of the portable heated stadium seat. An external recharger is used to charge the batteries prior to use, with the portable heated stadium seat thus being useable in locations where electrical power is not easily accessible.