Thirty-seven defendants, mostly oil workers, were tried after seven months of industrial action ended in rioting.
At least 15 people were killed in the unrest and more than 100 injured.
The violence in Zhanaozen was the worst unrest seen in Kazakhstan since its independence from the Soviet Union more than 20 years ago.
The 13 defendants were given sentences of up to seven years; 16 others received conditional sentences and the remaining defendants were either given amnesties or acquitted.
The hearings were conducted at a youth centre that had been turned into a makeshift courtroom in the Caspian port city of Aktau, about 150km (96 miles) west of Zhanaozen.
The BBC’s Central Asia correspondent Rayhan Demytrie says the scenes in the courtroom where chaotic.
Relatives of the defendants reportedly threw plastic bottles at the judge, amid claims those accused were tortured during the investigation.
Five policemen tried separately for their role in the violence were jailed last week for up to seven years for abuse of power.
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