The 2021 Darwin 9s will be held at Rugby Park, Marrara.
Rugby Park is located in the Marrara Sports Precinct in Darwin. The facility boasts two International Standard playing fields for Rugby Union. The main field features a main grandstand with undercover seating for 400 spectators, terracing opposite the main stand, and a small hill surrounding the rest of the field with an estimated capacity of around 5,000. It also has broadcast-quality lighting suitable for night matches.
Rugby Park is also the home of the annual Hottest 7s rugby tournament, which attracts teams from Australia, New Zealand, Fiji and Singapore. The facility is also the administrative headquarters of the Northern Territory Rugby Union.