Spencer Leniu (born 8 September 2000) is a Samoa international rugby league footballer who plays as a prop for the Penrith Panthers in the National Rugby League (NRL).
Leniu was born in Auckland, New Zealand. Leniu grew up in Sydney, Australia and played for the Minchinbury Jets in the Penrith District Junior Rugby League.
Leniu made his first grade debut for Penrith against the Cronulla-Sutherland Sharks in round 21 of the 2019 NRL season which ended in a 26-20 victory for Penrith at Panthers Stadium.