Mr Mann polled 27,467 votes to secure a majority of 4,852 in a heated campaign between four potential candidates.
Despite the fact his majority has been reduced, Mr Mann said he was “delighted” that he attracted a higher percentage of the vote compared to 2015.
In his acceptance speech, Mr Mann said the hold was a victory not only for him, “but for the people of Bassetlaw”.
Conservative Annette Simpson came second on 22,615; Leon Duveen, of the Liberal Democats was third with 1,154 and Independent candidate Nigel Turner was fourth with 1,014 votes.
When asked about his priority now that he has been re-elected, Mr Mann replied that he would continue working to re-open Bassetlaw Hospital children’s ward, which recently closed to night-time admissions.
He later went on to criticise Theresa May as “weak”, adding: “She should not have called this election.”
Mr Mann added he would become even more “outspoken” and that constituents would be “hearing more from him” in Parliament.
“There’s an opening for some home truths,” he added. “I want to be even more outspoken - there’s a lot not being said in Parliament that needs to be said.
“I’ve said it sometimes and I’m going to say it more often.”
Mr Mann was first voted into the Bassetlaw seat in 2001, making this his forth term in the role.
The turnout for Bassetlaw this year was 66.68 per cent, with 52,368 votes cast compared to 49,289 in 2015.