Sir Harold Basil Houldsworth, 2nd Baronet (21 July 1922 – 24 March 1990) was a British anæsthetist and Liberal Party politician.
He was the son of Sir Hubert Houldsworth, 1st Baronet and Hilda Frances Clegg.
He was educated at Heckmondwike Grammar School, Huddersfield Technical College and Leeds University, where he qualified as a doctor.
In 1948 he was called up to serve in the Royal Army Medical Corps and was given the rank of captain.
His mother was elected a Liberal member of the West Riding County Council.