South Island United FC
| Full name | South Island United Football Club | ||
|---|---|---|---|
| Nickname | The Southerners | ||
| Short name | SIU | ||
| Founded | 7 October 2025 | ||
| Ground | United Sports Centre | ||
| Capacity | 1,000 | ||
| Coordinates | 43°30′53″S 172°31′43″E / 43.5148°S 172.5286°E | ||
| Owner | Christchurch United | ||
| General Manager | Ryan Edwards | ||
| Head coach | Rob Sherman | ||
| League | OFC Professional League | ||
| 2026 | TBD | ||
| Website | southislandunited | ||
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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 first competed in the OFC Professional League (OFCPL) 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.