The Welsh Greyhound Derby was a former classic greyhound competition held in Wales. It was held at the White City Stadium in Cardiff from 1928 to 1937. After the closure of this stadium the race switched to the Cardiff Arms Park from 1945 until 1977. It gained classic status in 1971. The famous Mick the Miller, who was a household name during the 1930s won the event in 1930.