William Procter (1801–1884) was a U.S.-based English candlemaker and industrialist. He was the co-founder and co-eponym of Procter & Gamble Company in 1837, along with James Gamble.
Born in England, Procter emigrated to Cincinnati, Ohio in 1832, where he married Olivia Norris and started his business. At his father-in-law Alexander Norris's suggestion, he joined forces with his brother-in-law, James Gamble, to establish the company that bears their names. His son William Alexander Procter and grandson William Cooper served as company presidents.
Mr. Procter is buried in Spring Grove Cemetery.