Relieving congestion significantly influences the operation and security of the transmission network. Consequently, the congestion alleviation of transmission network in all power systems is imperative. Moreover, it could prevent price spikes and/or involuntary load shedding and impose high expenses on the transimission network, especially in case of contingency. Traditionally, the increasing or decreasing generation rescheduling has been used as one of the most imperative approaches for correctional congestion management when a contingency occurs. However, demand response programs (DRPs) could also be a vital tool for managing the congestion. Therefore, the simultaneous employment of generation rescheduling and DRPs is proposed for congestion management in case of contingency. The objective is to reschedule the generation of power plants and to employ DRPs in such a way so as to lessen the cost of congestion. The crow search algorithm is employed to determine the solution. The accuracy and efficiency of the proposed approach are assessed through the tests conducted on IEEE 30-bus and 57-bus test systems. The results of various case studies indicate the better performance of the proposed approach in comparison with different approaches presented in the literature.