William Franklin Irwin (September 16, 1859 – August 7, 1933) was a baseball player for the Cincinnati Red Stockings (AA) in 1886. He batted right and threw right-handed. He was born in Neville, Ohio and died in Fort Thomas, Kentucky. He played for the minor league Manchester Maroons in 1888 where he was a teammate of fellow major leaguers, Rooney Sweeney and John Shoupe.