Thomas Fleming may refer to:

• Thomas Fleming, Earl of Wigtown (died c. 1382), second person to hold the title earl of Wigtown
• Thomas Fleming, 2nd Baron Slane (1358–1435), member of the Irish Parliament, 1394–1395
• Thomas Fleming, 10th Baron Slane (died 1598), member of the Irish parliament of 1585
• Thomas Fleming (died 1624) (1572–1624), English landowner and politician
• Thomas Willis Fleming (1819–1890), English landed proprietor and Conservative MP
• Tom Fleming (Irish politician) (born 1951), Independent Teachta Dála (TD) for Kerry South

• Tom Fleming (baseball) (1873–1957), 19th-century baseball player
• Tom Fleming (bowls), English lawn bower
• Tom Fleming (footballer) (1901–?), English football defender
• Tom Fleming (hurler) (1901–1960), Irish full-back hurler
• Tom Fleming (runner) (1951–2017), American runner
• Tommy Fleming (soccer) (1890–1965), Scottish American football (soccer) player

• Thomas Fleming (bishop) (1593–1665), Irish Franciscan and Roman Catholic Archbishop of Dublin
• Thomas Fleming (flourmiller) (1848–1930), New Zealand flourmiller
• Thomas Fleming (historian) (1927–2017), American historian and writer of historical fiction
• Sir Thomas Fleming (judge) (1544–1613), English judge
• Thomas Fleming (political writer) (born 1945), editor of Chronicles: A Magazine of American Culture
• Thomas C. Fleming (1907–2006), American journalist
• Tom Fleming (actor) (1927–2010), Scottish actor and BBC commentator
• Tom Fleming (artist) (born 1966), artist
• Tom Fleming, bass player of the English band Wild Beasts
• Tommy Fleming (musician) (born 1971), Irish singer

• Thomas Flemming (born 1967), East German swimmer
• Thomas Fleming House (disambiguation)
• Fleming (surname)