The 2008 Oceania Swimming Championships were held in New Zealand and featured competition in swimming, open water swimming and synchronized swimming. It was the 7th Oceania Swimming Championships and second time that New Zealand hosted the event after playing host to the 2000 Championships.
The open water competitions were held from 3 February to 5 February near Rotorua in Lake Okataina and Lake Rotoma whilst the swimming and synchronized swimming competitions were carried out from 5 June to 8 June in Christchurch at the QEII Leisure Centre.
Twelve of the 13 federated members of the Oceania Swimming Association competed with the Northern Mariana Islands the only member not to send any swimmers. Two associate members also attending, bringing the total to 14: the French overseas department New Caledonia and the USA State Hawaii.