A portable footrest including a foot platform having a top surface and a bottom surface and a heater in thermal communication with the bottom surface. A housing is disposed in supporting relation to the foot platform and the heater. The housing is shaped and dimensioned to maintain the foot platform and the heater above a level of a surface upon which the footrest is placed. An electronic assembly is in electrical communication with the heater. The electronic assembly includes an electrical connector for connection to an power source, means for manually energizing and de-energizing the heater, and means for automatically de-energizing the heater.