The city hosted the tournament over the weekend with sell-out crowds at Waikato Stadium on both days.
Fiji took out the title after beating South Africa 24-17. New Zealand had to settle for fourth.
The New Zealand Rugby Union and World Rugby said the inaugural event in Hamilton over the weekend was a success, but New Zealand must now tender to host a series from 2020 onwards.
New Zealand Sevens Tournament general manager Steve Dunbar said hosting a world series in New Zealand could not be taken for granted.