Wong's fellow activists Nathan Law Kwun-chung was sentenced to 120 hours of community service, while third activist Alex Chow was given a three week jail.
Wong was the founder of the Scholarism student activist group that played a leading role in last year's protests demanding electoral reform for Hong Kong.
The Scholarism group, the student federation, and the Occupy Central campaign began protests late September 2014 in response to the Chinese authorities' alleged restrictive decision on proposed reforms to the Hong Kong electoral system. Protesters demanded direct elections of the city's chief executive to replace the current two-step process.
Demonstrators occupied numerous busy intersections across Hong Kong and attempted to storm the Hong Kong government headquarters. Government officials described the occupations as illegal, and a number of activists were detained. Demonstrations lasted for 79 days before the last remaining occupied areas were cleared by police forces.