Flack may refer to:

• Flack (TV series), a 2019 American-British TV series
• Flack, Virginia, the former name of Waynesboro
• Flack (or Flak), an informal term for a publicity manager
• Flacking, a self-coined term for the art created by Ememem

• Audrey Flack (1931–2024), American painter and sculptor
• Caroline Flack (1979–2020), British television presenter
• Doug Flack (1920–2005), English footballer
• Edwin Flack (1873–1935), Australian Olympic athlete in track and field and tennis
• Hertha E. Flack (1916–2019), American philanthropist and painter
• Hugh Flack (1903–after 1933), Irish footballer
• John Flack (bishop) (born 1942), British bishop of the Anglican Church
• John Flack (British politician) (born 1957), British Conservative politician
• Karen Flack, American mechanical engineer
• Layne Flack (1969–2021), American professional poker player
• Marjorie Flack (1897–1958), American author of children's books
• Max Flack (1890–1975), American professional baseball player
• Roberta Flack (born 1937), American jazz and soul singer
• Sophie Flack (born 1983), American ballerina
• Steve Flack (born 1971), English professional football player
• William H. Flack (1861–1907), American politician from New York; U.S. representative 1903–07

• Donald Flack Jr., character on the American television series CSI: NY
• George Flack, a newspaper correspondent in Henry James' novel The Reverberator

• All pages with titles containing Flack
• Flak (disambiguation)
• Fleck, a surname