South Island United

South Island United Football Club is a men's professional association football club based in Christchurch, New Zealand. Established in 2025, the club is owned and operated by Christchurch United and will compete in the OFC Professional League (OFCPL) beginning with the 2026 season. It is the third professional football club in New Zealand after Wellington Phoenix and Auckland FC and the first in the South Island.

South Island United was formed in 2025 as the professional branch of Christchurch United, one of New Zealand’s most successful football clubs. The creation of the new club followed Christchurch United's successful bid for entry into the newly established OFC Professional League, announced by the Oceania Football Confederation in August 2025.