Michael Joe Cosgrave (born 9 March 1938) is an Irish former Fine Gael politician. He was for some years a Teachta Dála (TD) for the Dublin North-East constituency, and also served as a local councillor.
He was educated at St. Joseph's CBS, Fairview, at the School of Management Studies in Rathmines, and at University College Dublin.
He was first elected to Dáil Éireann as a Fine Gael TD for the Dublin Clontarf constituency at the 1977 general election. When that constituency was abolished, Cosgrave secured election at Dublin North-East in 1981. There he retained his seat until losing it at the 1992 general election, his defeat owing to the national swing to the Labour Party. He regained his seat at the 1997 general election but lost it again in 2002.
In 1999 Cosgrave was elected as a member of Fingal County Council for the Dublin suburb of Howth. He retained his seat at the 2004 local elections and retired in 2009.