I don't have real-time access to databases or updates, so I can't provide a comprehensive or current list of all secondary schools in Mt. Hagen, Papua New Guinea. However, here are a few known secondary schools in the area:
- Mt. Hagen Secondary School
- St. Joseph's International Catholic College
- Mendi Secondary School (located nearby but often referred to in the context of the Western Highlands)
For a complete and current list, I recommend checking local government education websites, or contacting the Western Highlands Provincial Education Office. They would have the most updated information on secondary schools in Mt. Hagen.