The 1985 Southeast Asian Games (Thai: กีฬาแห่งเอเชียตะวันออกเฉียงใต้ 1985, romanized: Kila haeng echeiy tawan oak cheing tai 1985), officially known as the 13th Southeast Asian Games, was a Southeast Asian multi-sport event held in Bangkok, Thailand from 8 to 17 December 1985.