Teams competing in previous years, Canada, Japan and the United States were not scheduled to participate in the tournament for 2016 and 2017 due to the 2019 Rugby World Cup qualifying format.

[3] Touch judges: Mike Fraser (New Zealand) Brendan Pickerill (New Zealand) Notes: Touch judges: JP Doyle (Ireland) James Leckie (Australia) Notes: Touch judges: JP Doyle (Ireland) James Leckie (Australia) Notes: Note: Number of caps and players' ages are indicated as of 11 June 2016 – the tournament's opening day, pre first tournament match.

On 20 May, Head Coach John McKee announced a 28-man squad for the Pacific Nations Cup and their June test against Georgia.

[8] Winger Adriu Delai and lock Savenaca Tabakanalagi were late additions to the squad ahead of the Tongan fixture on 11 June.

On 10 May, Head Coach Alama Ieremia announced a 40-man extended squad for the Pacific Nations Cup and their June test against Georgia.