John D. Fredericks

John Donnan Fredericks (September 10, 1869 – August 26, 1945) was a U.S. Representative from California.

Born in Burgettstown, Pennsylvania, Fredericks attended the public schools and Washington and Jefferson College, Washington, Pennsylvania. He studied law. He was admitted to the bar in 1896 and commenced practice in Los Angeles, California. He served as an adjutant in the Seventh Regiment, California Volunteer Infantry, during the Spanish-American War in 1898. He served as district attorney of Los Angeles County 1903-1915. He was an unsuccessful Republican candidate for Governor of California in 1914 against Hiram Johnson, who had been elected under the Republican Party banner 4 years previous.

Fredericks was elected as a Republican to the Sixty-eighth Congress to fill the vacancy caused by the death of Henry Z. Osborne. He was reelected to the Sixty-ninth Congress and served from May 1, 1923, to March 3, 1927. He was not a candidate for renomination in 1926. He resumed the practice of law at Los Angeles where he died August 26, 1945. He was interred in Forest Lawn Memorial Park.