Lukashenko, who has ruled for nearly three decades, has faced a wave of anger over his handling of the coronavirus pandemic.
Official state-approved exit polls give him an overwhelming majority with nearly 80 percent.
His main opponent, Svetlana Tikhanovskaya—a former teacher—won nearly seven percent of the vote. However, one independent monitoring agency is disputing that finding. After counting more than one million ballots, the agency says that Tikhanovskaya won some 80 percent.