Thomas Costello

Thomas or Tom Costello may refer to:


 * Tom Costello (music hall) (1863–1943), British music hall comedian and singer
 * Tom Costello (jockey) (1866–?), American jockey
 * Thomas W. Costello (born 1945), politician from Vermont in the United States
 * Thomas Costello (hurler) (born 1978), Irish hurler from Tipperary
 * Tom Costello (politician), Irish Labour Party politician, mayor of Galway, 2007–2008
 * Tom Costello, CEO and founder of Cuil
 * Tom Costello (journalist) (born 1963), NBC News journalist
 * Thomas Moore Costello (1883–1954), lawyer, judge and political figure in Ontario
 * Thomas Joseph Costello (1929–2019), American prelate of the Catholic Church
 * Thomas Costello (bishop), Irish bishop
 * Thomas Brandon Costello (fighter) (born 1991) American professional fighter