Radical Sikh preacher Amritpal Singh has won the Khadoor Sahib seat by defeating Congress' Kulbir Singh Zira, according to the Election Commission.
Singh, who contested the election as an independent candidate, won by a margin of 197,120 votes.
He is the chief of the 'Waris Punjab De' outfit and is currently in jail in Assam's Dibrugarh under the National Security Act (NSA).
Counting of votes for the 13 Lok Sabha seats in Punjab began at 8 am amid tight security arrangements.