Steny Hamilton Hoyer (pronounced /ˈstɛni ˈhɔɪ.ər/; born June 14, 1939) is the U.S. Representative for Maryland's 5th congressional district, serving since 1981. The district includes a large swath of rural and suburban territory southeast of Washington, D.C.. He is a member of the Democratic Party.

He was first elected in 1980 and served as the House Majority Leader from 2007 to 2011. He had previously served as House Minority Whip from 2003 to 2007, and was reelected to that post in 2011. These positions make him the second-ranking figure in the House Democratic Leadership hierarchy.

Hoyer was born in New York City but grew up in Mitchellville, Maryland. His mother, Jean (née Baldwin), was American, and his father, Steen Theilgaard Høyer, was Danish and a native of Copenhagen; "Steny" is a variant of his father's name, "Steen", and Hoyer is an anglicized form of the fairly common Danish surname "Høyer". He graduated from Suitland High School in Suitland, Maryland.