Sydney Scholefield Allen QC (3 January 1898 – 26 March 1974) was a barrister and Labour Party politician in the United Kingdom. Born in Birkenhead to Joseph Allen and his wife Edith (née Scholefield), he was educated at Birkenhead Institute and Liverpool University, from where he graduated with first class honours in law. He served with the Royal Artillery during the First World War, and subsequently was called to the Bar at Gray's Inn.