When were most average American homes electrified?

Most average American homes were electrified in the 1930s and 1940s, with significant progress made during the New Deal era. The Rural Electrification Administration, established in 1935, played a critical role in extending electricity to rural areas, helping to increase the national electrification rate from about 10% in 1930 to over 90% by the 1950s. Urban homes had generally been electrified earlier, but widespread access in rural areas took until mid-century.