Reveal Games overstayer numbers: Greens

Australians deserve to know how many Commonwealth Games athletes and team staff went missing during the Gold Coast event, a Greens Senator believes.

Immigration spokesman Nick McKim also wants the government to reveal how many have applied for asylum.

The numbers are needed to hold Home Affairs Minister Peter Dutton to account for decisions he makes on applications, Senator McKim told ABC radio.

Initially, it was believed 11 participants had not returned home, including five boxers and three wrestlers from Cameroon, two athletes from Uganda and a Rwandan Paralympic powerlifting coach.

Sydney Refugee Advice and Casework Service principle solicitor Sarah Dale said there were at least 19.

Her organisation helped a number of people lodge applications for protection before their federally approved games visas expired on Tuesday night.

Senator McKim says he'll quiz department officials during Senate estimates hearings next week.