| No. | Year | Host City | Host Country | Dates | Notes |
|---|---|---|---|---|---|
| 1 | 2008 | Algers | Algeria | Mar 18 — Mar 25, 2008 | Ist General Assembly of the OSMA held in Alger, Algeria under the patronage of His Excellency Buteflika, then President of the Democratic Arab Republic of Algeria |
| 2 | 2010 | Yaounde | Cameroon | Mar 5 — Mar 15, 2010 | This was a double event for OSMA, as was the inauguration of the Headquarters and at the time the 2nd General Assembly of OSMA |
| 3 | 2012 | Luanda | Angola | Mar 18 — Mar 25, 2012 | |
| 4 | 2014 | Hammamet | Tunisia | Mar 3 — Mar 8, 2014 | |
| 5 | 2017 | Asmara | Eritrea | Mar 8 — Mar 10, 2017 | |
| 6 | 2019 | Marrakech | Morocco | Mar 3 — Mar 10, 2019 | |
| 7 | 2022 | Freetown | Sierra Leone | Feb 19 — Feb 27, 2022 | |
| 8 | 2024 | Abuja | Nigeria | Feb 24 — Mar 3, 2022 | |
| 9 | 2026 | Livingstone | Zambia | Apr 12 — Apr 18, 2024 | Elective General Assembly where the Secretary General was reelected for another 4year mandate |