They presently play in the Welsh Rugby Union WRU League 3 East Central B. Llandaff RFC was formed in 1876 by Cambridge graduate Illtyd Thomas, and these links are reflected in the team still playing in Cambridge blue.

[1] It is believed that Llandaff were one of nine teams that were represented at the Tenby Hotel in 1880, in an early attempt to found the Welsh Rugby Union.

[2] In 1881 Llandaff RFC player, Leonard Watkins, played in the first Welsh international, against England.

Unusual for a Welsh rugby team, Llandaff has played their rugby on the same pitch, Bishop's Field,[6] since their inception, though like all clubs in Wales the team ceased playing during the First World War.

The team reformed after the war but lost their WRU status, and could not play in official competitions.