The court, however, acquitted five people for lack of evidence. This was the second conviction by the court in riot cases.
Kandhamal district, about 200 km from here, witnessed widespread violence after the murder of Vishwa Hindu Parishad (VHP) leader Swami Laxmanananda Saraswati and four of his aides at his ashram Aug 23.
More than 25,000 Christians were forced to flee their homes after their houses were attacked by rampaging mobs, who held Christians responsible for Saraswati's killing although police blamed the Maoists.
The government has set up two fast-track courts to try cases related to the communal violence.