Sean Clancy may refer to:
Seán Clancy (1901–2006), member of the Irish Republican Army during the War of Independence, later an Irish Defence Forces lieutenant-colonel Seán Clancy (Irish general) (), former Chief of Staff of the Irish Defence Forces Seán Clancy (composer) (born 1984), Irish composer and lecturer Sean Clancy (American football) (born 1956), American football linebacker Sean Clancy (fighter) (born 1988), Irish kickboxer Sean Clancy (footballer) (born 1987), English footballer