David Fisiiahi is a Tongan rugby league player who represented his country at the 2000 World Cup and currently plays for the Ellerslie Eagles. He is the identical twin of fellow Tongan International Paul.
Fisiiahi represented both the New Zealand Residents and Tonga in 2000. He represented Tonga at the 2000 World Cup, playing in three matches. Also was selected for Niue for pacific games 2009 as he is part niuean.