He had broadcast videos totaling around 110 hours of airtime and posted 366 articles “defaming the Communist Party and socialism, humiliating Ho Chi Minh and other party and state leaders,” the state-run Vietnam News Agency reported.
Vuong pleaded not guilty to charges of disseminating anti-state propaganda and told the court in central Lam Dong province that he had simply voiced personal views.
“The court, however, said his behavior was a danger to society,” VNA reported.
Human Rights Watch deputy Asia director Phil Robertson said Vuong’s sentence was “outrageous and unacceptable”.
“The government of Vietnam should cease its crackdown against bloggers and activists, and free all people they have locked away because they dared to say what they think,” he added.
A day earlier the same court had sentenced three others to jail terms of up to seven years for allegedly aiming to overthrow the Communist party.