It was the first general election held since the 2014 coup, after which the current ruling National Council for Peace and Order (NCPO) came into power with Prayut Chan-o-cha as its prime minister.
Several polls showed that opposition parties would win most seats in the lower house.
Suandusit Poll showed that Pheu Thai Party would win 173 seats of the lower house, followed by pro-NCPO party Palang Pracharath's 96 seats.
The poll also showed Democrat Party would win 88 seats, followed by Future Forward's 49 seats.
Bangkok Poll, however, released a report showing that pro-NCPO party came the first, but opposition parties combined still overpass the pro-NCPO party.
Bangkok Poll showed that Palang Pracharath party would win 25.9 percent of all the votes, followed by Pheu Thai's 25.6 percent, Future Forward's 20.5 percent and Democrat's 15.1 percent.
The election commission is to release the unofficial 95 percent result of the voting later on March 24.
