Rosemary Byrne (born 3 March 1948, Irvine, North Ayrshire) is a Scottish politician and co-convenor of Solidarity, along with Pat Lee.
She is a former Member of the Scottish Parliament (MSP) for the South of Scotland region 2003–2007.
She was elected as a Scottish Socialist Party MSP but in September 2006, together with Tommy Sheridan, she left that party to form Solidarity.
Byrne lives in Irvine, and was a teacher and a trade union activist for several years.
At one time she was president of Irvine Trades Council.