Joanna Tuffy (born 9 March 1965) is an Irish Labour Party politician. She has been a Teachta Dála (TD) for the Dublin Mid–West constituency since 2007.
Born in England in 1965, Tuffy was educated at Trinity College, Dublin (BA) and the Dublin Institute of Technology (Legal Studies).
She was elected to South Dublin County Council for the Lucan area in 1999 and served until 2003. At the 2002 general election she unsuccessfully stood for election to Dáil Éireann for Dublin Mid–West. She was subsequently elected to the 22nd Seanad Éireann by the Administrative Panel. She elected to Dáil Éireann for the first time at the 2007 general election.
Her father is Eamon Tuffy, a Labour Party councillor for Lucan, he was co-opted to replace her in 2003.
She along with TD Tommy Broughan both opposed Labour going into coalition with Fine Gael in the aftermath of the 2011 general election.