John Costello

John Costello may refer to:

• John Costello (baseball) (born 1960), American baseball pitcher
• John A. Costello (1891–1976), Taoiseach of Ireland
• John M. Costello (1903–1976), U.S. Representative from California
• John Costello (Medal of Honor recipient) (1850–?), U.S. Navy sailor and Medal of Honor recipient

See also

• John Costelloe, Irish politician, member of Seanad Éireann from 1963–1965
• John Costelloe (actor) (died 2008), American actor