This paper presents a design and simulation of a supervisory control and data acquisition (SCADA) system to improve the reliability of a distribution feeder in Bahir Dar, Ethiopia. The SCADA system was modeled using MATLAB Simulink and Java programming language, and it includes sensors, circuit breakers, and a human-machine interface (HMI) for remote monitoring and control of the distribution feeder. The results of the simulation show that the proposed SCADA system has significantly improved the reliability of the distribution feeder, with a 60% reduction in the system average interruption duration index (SAIDI), a 61% reduction in the customer average interruption duration index (CAIDI), and a 1.11% improvement in the average service availability index (ASAI).