Elmer Louis Winter (March 6, 1912 – October 22, 2009) was an American lawyer who co-founded the Manpower Inc. temporary employment agency in 1948, after his law firm encountered difficulties hiring secretarial assistance in an emergency. By the time of his death, the firm was the world's third-largest temporary staffing firm, with 400,000 clients served by 4,100 offices in 82 countries.