Vincent MacDowell (1925–2003) was an Irish political activist.
He was the vice chairman of Northern Ireland Civil Rights Association in the 1960s, and later a representative of the Green Party and the Irish Labour Party.
Born in Newry, County Down, MacDowell was interned for IRA membership in the 1940s.
MacDowell advocated the Irish Labour Party re-organising in Northern Ireland, and supported the party in elections in the late 1940s and early 1950s in Belfast.
His daughter is Nuala Ahern, a former Green Party MEP.