Parliamentary elections were held in Mongolia on 19 June 1977.[1] At the time, the country was a one-party state under the rule of the Mongolian People's Revolutionary Party. The MPRP won 328 of the 354 seats, with the remaining 26 seats going to non-party candidates, who had been chosen by the MPRP due to their social status.[2] Voter turnout was reported to be 100%, with only one of the 694,855 registered voters failing to cast a ballot.[3]