The following countries have offered to host the International Olympiad on Astronomy and Astrophysics in future years. Three of these have confirmed their intentions with official letters of support from the Ministry of Education or equivalent body; we are awaiting confirmation from the remainder. The list of hosts remains open beyond 2023.
12th IOAA (2018) Beijing, China (confirmed)
13th IOAA (2019) Keszthely & Heviz, Hungary (confirmed)
14th IOAA (2020) Bogota, Colombia
15th IOAA (2021) Belgrade, Serbia (confirmed)
16th IOAA (2022) St. Petersburg, Russia (confirmed)
17th IOAA (2023) Kazakhstan