Ian Paisley Jnr will take over from his father as MP for North Antrim.
His bitter rival Jim Allister of Traditional Unionist Voice (TUV) had been expected to mount a major challenge because of his opposition to Unionists sitting with Sinn Féin in the powersharing government at Stormont.
But he trailed in a poor second, more than 12,500 votes behind Mr Paisley who was favourite to win, but not by such a massive majority. His father, the Rev. Ian Paisley, held the seat for 40 years.