Hong Vo (born 1957) is a Vietnamese Australian social worker from the Melbourne and member of pro-democracy organization Viet Tan who was arrested in Ho Chi Minh City in Vietnam on October 10, 2010 for participating in a peaceful political demonstration in Hanoi, Vietnam affirming Vietnam's sovereignty over the Paracel and Spratly islands. She is being held under Article 84 of Vietnam's penal code, which is often used to charge and convict pro-democracy activists.