Doncaster Brewery, based on Young Street, in the town centre, has revealedÂ plans to create a beer to back the campaign, which has the support of its boss, Ian Blaylock.
He said: 'We're going to call it Back the Bid, and we'll use rugby league related artwork on the pump clips.Â
'We've got some connections with the rugby clubs,Â and the Dons have a decent following among our customers.
'We get a lot of people at our brewery bar when the Dons are playing at home at the Keepmoat, and if the Doncaster Knight, the rugby union club are at home.
'I'm supportive of the world cup bid. I think its great to see anything that brings people into Doncaster, and that's not just from a business perspective.
Youngsters spearhead Doncaster's campaign to host rugby league world cup games
'I used to play rugby at school and I think it's entertaining. I like both codes, rugby league and rugby unionÂ and I'll certainly try to go to the matches if Doncaster gets some.Â
'My dad used to play rugby league for Rossington Boys, and that's perhaps were my interest comes from.'
Mr Blaylock is currently holding a beer festival at theÂ Doncaster Brewery Tap on Young Street, next to his brewery, but the new world cup aleÂ will not be available in time for that.
Organisers of the 2021 world cup, to be held in England, confirmed last month that Doncaster has passed the first stage of the selection process - meaning it is now an official candidate in the battle to stage the matches.
The candidate stage runs from until October 12, and during this time, rugby league officials will make site visits to the borough's facilities and write an assessment report review.
Decisions are expected to be made in January 2019.
In total, 16 teams will play 31 matches during the tournament. There will also be 14 venues hosting games, and the minimum capacity for a stadium will be 12,000. The Keepmoat Stadium, where any games would be played in Doncaster, seats 15,000 spectators.