The Cardiff Arms Park is a sports complex in Cardiff, Wales. The complex is and has been home to mutiple sports stadia and other facilities.

Sports grounds that are and have been built on the site include:

• Cardiff Arms Park Bowling Green - is home to Cardiff Athletic Bowls Club (CABC) was established in 1923,^[1] and ever since then, the club has used the Arms Park as its bowling green. The bowls club is a section of the Cardiff Athletic Club and shares many of the facilities of the Cardiff Arms Park athletics centre.^[2]

The Les Spence Memorial Gates were erected in memory of the former Cardiff RFU player, who captained the team in 1936–37. He was born in 1907 and became chairman of the Cardiff RFU and president of the WRU between 1973 and 1974. He was awarded an MBE and died in 1988.^[3]

• Cardiff Arms Park Cricket Ground - In 1819 Cardiff Cricket Club was formed and by 1848 they had moved to their new home at the Arms Park.^[4] Glamorgan County Cricket Club, at the time not a first-class county, played their first match at the ground in June 1869 against Monmouthshire Cricket Club.^[5] The county club played their first County Championship match on the ground in 1921,^[6] competing there every season (except while first-class cricket was suspended during the Second World War) until their final match on the ground against Somerset in August 1966.

Cardiff Cricket Club played their final game at the ground against Lydney Cricket Club on 17 September 1966. Both Cardiff Cricket Club and Glamorgan then moved to a new ground at Sophia Gardens on the opposite bank of the River Taff to the Arms Park following work on the creation of the national rugby stadium.^[7]

The first first-class cricket match to be held on the ground was between West of England and East of England, on 20 June 1910. In all more than 240 first-class matches were played on the ground, all but two involving Glamorgan as the home team.^[8] Only one List A cricket match was played on the ground, Glamorgan's Gillette Cup fixture against Somerset on 22 May 1963.^[9]

• Cardiff Arms Park Stadium - A rugby union stadium built in 1969. It is currently home to Cardiff RFC.
• Millennium Stadium - The national stadium of Wales, built on the site of the old National Stadium in 1999. Whilst geographically it is built on the site of Cardiff Arms Park it is not an official part of the site. It is home to Welsh Rugby Union as well as the Speedway Grand Prix of Great Britain. It was the previous home of Welsh Football which has since moved to Cardiff City.
• National Stadium - Wales's former national stadium which was demolished in 1997 to make way for its successor - The Millennium Stadium. Unlike the Millennium Stadium, the National Stadium was an official part of Cardiff Arms Park. It had been home to Welsh Rugby Union and Welsh Football during its lifespan.