The motorized wheel accessory for a stroller is an after-market device that is configured to interface with a stroller in order to mobilize the stroller without the need for an end user to actually push said stroller. The motorized wheel accessory includes a frame that is configured to attach onto a rear axle of a stroller. The frame includes a power member that is wired to a motor. The motor is in mechanical connection with a pair of wheels. The pair of wheels propel the stroller. The frame may be adjustable to accommodate differently-sized strollers.