Pat Doherty was returned with a 10,000-plus majority in West Tyrone.
The result was never in doubt, with Sinn Fein having held this constituency comfortably since 2001.
He was elected to loud cheers and applause when the result was declared at Omagh Leisure Centre shortly after 1.30am this morning.
The main battle was for second place, with the DUP's Tom Buchanan finishing runner-up.
The SDLP's Daniel McCrossan came third with 6,444 votes, just ahead of the UUP candidate Ross Hussey who polled 6,144.
Mr Doherty said it was a clear sign that West Tyrone had rejected austerity.
"The vote that the Tory candidate got (169 votes) is an indication of what West Tyrone thinks of austerity," he said.
He added: "West Tyrone is a republican constituency, and we're proud that it is a republican constituency."
Mr Doherty said his party was determined to bring about the unification of Ireland through peaceful and democratic means.
Alliance's Stephen Donnelly took 869 votes, Green candidate Ciaran McClean received 780, and cannabis campaigner Barry Brown took 528 votes. Controversial candidate Susan-Anne White, who called for homosexuality to be recriminalised, finished last with 166 votes.