IIMUN XVI (2026) registration is now open [Click this link to be taken to the registration page]. Early registration ensures we can create an appropriate amount of committees and keep committees appropriately balanced. We will confirm your numbers as we get closer to the event, so a best guess estimate is fine for attendees. Our target range per committee for delegate counts is somewhere between 26 and 30. We have had committees as large as 42 in years where we have some last minute large registrations. Feel free to sign up at our registration page if you would like to attend IIMUN XVI!
IIMUN XV is currently at capacity and we are unable to accept any additional registrations. Thank you for your continued patronage, and we look forward to seeing you on 15 March 2025 at Trabuco Hills High School!
IIMUN XV registration is now open [Click this link to be taken to the registration page]. Early registration ensures we can create an appropriate amount of committees and keep committees appropriately balanced. We will confirm your numbers as we get closer to the event, so a best guess estimate is fine for attendees. Our target range per committee for delegate counts is somewhere between 26 and 30. We have had committees as large as 35 in years where we have some last minute large registrations. Feel free to sign up at our registration page if you would like to attend IIMUN XV!
IIMUN XV will be hosted at Trabuco Hills High School 15 Mar 2025!
IIMUN XIV is at near capacity, but accepting schools on a waitlist. When schools return their final numbers to us, we may be able to accommodate your program. Please email 
to inquire about being added to the waitlist.
IIMUN XIV registration is now open [Click this link to be taken to the registration page]. Early registration ensures we can create an appropriate amount of committees and keep committees appropriately balanced. We will confirm your numbers as we get closer to the event, so a best guess estimate is fine for attendees. Our target range per committee for delegate counts is somewhere between 26 and 30. We have had committees as large as 35 in years where we have some last minute large registrations. Feel free to sign up at our registration page if you would like to attend IIMUN XIV!
IIMUN by THHSMUN 