The men's and women's tournaments were hosted at ANZ Stadium in Suva last December and will both return to the Fijian capital until at least 2019.
A record 21 teams are set to contest the 2017 Championships, including 13 men's teams and eight women's sides.
New Zealand will also enter teams in both the men's and women's competition for the first time in three years.
The Minister for Youth and Sports, Laisenia Bale Tuitubou, said the Fiji Government was delighted to secure hosting rights for another three years.
