William A. McKeighan (Born 1842-d. 1895) was a Nebraska Populist politician.
Born in Millville, New Jersey on January 19, 1842. Moved with his parents to Fulton County, Illinois in 1848. Enlisted in the Eleventh Regiment, Illinois Volunteer Cavalry, in September 1861, to fight in the civil war. When the war ended he was stationed on a farm near Pontiac, Illinois. He decided to take up farming. He moved to Nebraska in 1880 and continued farming near Red Cloud, Nebraska.
He started to take interest in vreating the Farmers' Alliance, he was elected Probate Judge of Webster County from 1885 to 1887. Ran and lost in the 1888 election to the 51st congress. He ran and won the 2nd district seat in the 52nd congress and the newly created 5th district in the 53rd, being in congress from March 4, 1891 to March 3, 1895. He ran and lost for reelection in 1894, and died in Hastings, Nebraska on December 15, 1895. He is interned in Red Cloud Cemetery, Red Cloud, Nebraska
Preceded by: Gilbert L. Laws (R) Member of the U.S. House of Representatives from Nebraska's 2nd congressional district March 4, 1891 - 1893 Succeeded by: David Henry Mercer (R) Preceded by: Seat created Member of the U.S. House of Representatives from Nebraska's 5th congressional district 1893 - March 3, 1895 Succeeded by: William E. Andrews (R)