These are the secondary schools found in Western Province (South Fly & North Fly).

• Kiunga Secondary School
• Tabubil Secondary School
• St. Gabriel's Technical Secondary School
• Daru Secondary School
• Awaba Secondary School ​

​There are only three Secondary schools in Gulf Province. Below is the list of schools in GULF PROVINCE.

• Coronation (Kerema) Secondary School
• Kikori Secondary School
• Don Bosco (Araimiri) Secondary School

Here is the list of secondary schools in Central Province. 

• ​Iarowari Secondary School
• Kwikila Secondary School
• Kupiano Secondary School
• Laloki Secondary School
• Sacred Heart (Tapini) Secondary
• Mainohana Catholic Secondary
• Mt. Diamond Adventist Secondary
• Sogeri National High school

There are several secondary schools in West New Britain Province. Some are Church run schools while others are government schools. Few are private schools.
List of secondary schools in West New Britain Province

• ​Caritas Technical Secondary School
• Kimbe Secondary School
• Hoskins Secondary School
• Bialla Secondary School
• Malalia Secondary School
• Poinini Catholic Agricultural Technical
• Trinity Secondary School
• Bialla matriculation 
• Kimbe Grammar
• Kimbe International School 

Here is the list of Secondary Schools in NEW IRELAND PROVINCE. Some are Church run schools while others is government schools.

List of Secondary schools in New Ireland Province 

• Madina Secondary School
• Utu Secondary School
• Namatanai Secondary School
• Lihir Secondary School
• Manggai Secondary School
• OLSH International 

There are only three (3) secondary schools in Manus Province.  Below is the list of the secondary schools in  ​MANUS PROVINCE.

1. Manus Secondary School
2. Ecom Secondary School
3. Papitalai Secondary School

​

There are several Secondary schools in East New Britain Province of PNG. Some schools are run by the churches while others are government schools. 
List of Schools in EAST NEW BRITAIN PROVINCE.

1. Boisen Secondary School
2. Kokopo Secondary School
3. Malabunga Secondary School
4. Palmalmal Secondary School
5. Malaguna Technical Secondary School
6. Utmei Secondary School
7. Warangoi Secondary School
8. George Brown Secondary School
9. O.L.H.S Vunapope Secondary School
10. St.Mary's(Vuvu) Secondary School
11. Bitapaka Secondary School
12. Kambubu Adventist Secondary School
13. Vunabosco Agro-Technical Secondary School
14. Sacred Heart International Catholic Secondary
15. Kerevat National High School

Here is the list of Secondary Schools in Bougainville. 

1. Arawa Secondary School
2. Buin Secondary School
3. Hutjena Secondary School
4. Tonu Secondary School
5. Asitavi(St.Mary's)Secondary School
6. Bishop Wade (Talena) secondary
7. Runa Secondary

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Here are the list of secondary schools in West Sepik or Sandaun Province of Papua New Guinea. 

• Telefomin Secondary School
• Vanimo Secondary School
• Green River Secondary School
• Oksapmin Secondary School
• St.Ignatius Secondary School
• St.Francis(Nuku)Secondary School
• Don Bosco(Vanimo) Secondary School
• St John (Vianney) Minor Seminary

Secondary Schools in Morobe Province. Below is the list of secondary schools in the Morobe Province. 

1. Bugandi Secondary School
2. Busu Secondary School
3. Dregerhafen Secondary School
4. Markham Valley Secondary School
5. Lae Secondary School
6. Wau(Grace Memorial)Secondary School
7. Wasu Secondary School
8. Menyamya Secondary School
9. Kabwum Secondary School
10. Bumayong Lutheran Secondary School
11. Malahang Technical Secondary School
12. Lae Christian Academy
13. Coronation College
14. AOG Secondary 
15. Lae Christian Integrated
16. Wawin National High School