Glamorgan Wanderers began as the Old Monktonians, formed by ex-pupils of Monkton House School in 1893. In 1913 the team changed their name to Glamorgan Wanderers to reflect the wider intake of their membership. The club played rugby on seven different grounds in the earlier years, including former Cardiff RFC ground Sophia Gardens and Llandaff RFC's pitch Bishop's Field, until they were able to purchase their present ground in 1951. The ground was purchased via various fund raising appeals and is named the Memorial Ground in honour of former players who had lost their lives in the two World Wars.
The Wanderers were an important influence on rugby sevens in Wales, having hosted the country's first seven-a-side competition in April 1939. The game of seven-a-side rugby had been played in England since 1926, but the Welsh Rugby Union had blocked any attempts for the game to be played for profit. The profits from these first games by Glamorgan Wanderers were donated to charities stipulated by the WRU.