Harold Elgan Rees (born 5 January 1954) is a former Welsh international rugby union player. He toured with the British Lions to New Zealand in 1977, when he had yet to be capped by Wales, and South Africa in 1980 and at the time played club rugby for Neath. He made his international debut for the British Lions against New Zealand at Eden Park, Auckland, in August 1977 but had to wait until January 1979 for his first Wales cap, against Scotland at Murrayfield.