Millerton is an unincorporated community and census-designated place in Fresno County, California. It is located 3 miles (5 km) east of Friant and 23 miles (37 km) north-northeast of Fresno. Its population was 686 in 2020. Millerton Lake is located in the southern portion of California's Central Valley in Fresno and Madera counties. The lake lies in the upper San Joaquin River Watershed.