一个中国
Ōgon Shrine - Oil-paper umbrella - Okinotorishima - Old City of Zuoying - Old Taiwan dollar - One-China policy - One Country on Each Side - One Town One Product (Republic of China) - Oolong - Orchid Island - Orthodoxy in Taiwan - Otōemon Hiroeda - Outline of Taiwan - Ouyang Tzu - Overseas Compatriot Affairs Commission - Oyster omelette