Belfast South (Irish: Béal Feirste Theas, Ulster Scots: Bilfawst Sooth) is a constituency in the Northern Ireland Assembly.

It usually shares boundaries with the Belfast South UK Parliament constituency, however the boundaries of the two constituencies were slightly different from 1983 to 1986 and 2010–2011 as the Assembly boundaries had not caught up with Parliamentary boundary changes and from 1996 to 1997 when members of the Northern Ireland Forum had been elected from the newly drawn Parliamentary constituencies but the 51st Parliament of the United Kingdom, elected in 1992 under the 1983–95 constituency boundaries, was still in session.

The constituency is formed from the Belfast City Council districts of Balmoral and Botanic as well as one ward from Titanic and a number of wards from Lisnasharragh and Lisburn and Castlereagh.

Note: Charles Smyth sought election as a Procapitalism candidate, and appeared as such on the ballot paper.

Successful candidates are shown in bold.