Sylvester Namo (born 26 August 2000) is a Papua New Guinean professional rugby league footballer who plays as a prop forward for the Castleford Tigers in the Super League.
He represents Papua New Guinea at international level and played at the 2021 Rugby League World Cup. He has previously played for the PNG Hunters and Townsville Blackhawks in the Queensland Cup. He has spent time on dual registration from Castleford at Newcastle Thunder in League 1.