It has been revealed that wait times for some migrant family visas are, on average, 56 years.

Senate estimates last week confirmed average wait times for certain visas, revealing the statistic.

First assistant secretary Peta Dunn said that 75 percent of partner and child applications take between 10 and 21 months to be processed.

Contributory parents, or those who can pay a $47 455 fee, wait on average 45 months for a visa, and others wait between 30 to 56 years.