The article proposes a system for automatic regulation of the voltage level in district and rural distribution networks based on the theory of fuzzy sets. A scheme and a fuzzy algorithm for voltage and reactive power regulation in district and rural areas have been developed. Distribution networks based on the Mamdani algorithm depend on the voltage level of the complex electrical load. Based on the results of the simulation, graphs of the change in the complex electrical load and voltage were obtained, on which the operation of the fuzzy and classical regulators is presented. During the operation of the fuzzy and classical regulators, when the voltage deviation at the terminals of the complex electrical load reaches -5% of the zone, the fuzzy regulator is triggered. The operation of the classical regulator is carried out with a delay. As a result, the quality of the voltage increases, and the losses of electric energy in district and rural areas decrease.