This paper proposes a load frequency control (LFC) approach for multi-microgrids (MMGs) using the World Cup Optimization (WCO) algorithm. The proposed approach aims to enhance the frequency regulation of MMGs while maintaining the power balance between generation and load. The LFC system consists of a proportional-integral (PI) controller and proportional–integral–derivative controller (PID) which is tuned using the WCO algorithm to optimize the controller parameters. The effectiveness of the proposed approach is evaluated on a test system comprising two interconnected MMGs. The simulation results demonstrate that the proposed LFC approach using WCO outperforms other optimization algorithms and effectively maintains the frequency within acceptable limits during various load variations and disturbances. Moreover, the proposed approach also ensures the power balance among the MMGs, leading to a stable operation of the entire power system.