More than 1,000 people have signed a petition against the 'bedroom tax' and more meetings have been planned across the borough.
Some council tenants have seen their housing benefit cut if they have a spare room, leaving them afraid they will struggle to make ends meet.
The number of people affected in Barnsley is 3,664 and more than 100 people have attended meetings in Athersley and Kendray - with more planned in Royston, Gawber and Worsbrough.
Fran Postlethwaite, of Barnsley Against Bedroom Tax, said the majority of people in Barnsley are disgusted and terrified at the thought of losing their homes.
The group wants a commitment from the council that nobody will be evicted if they fail to make the payments.
Protests have been held in Barnsley town centre and the group met in Wombwell on Wednesday to collect more signatures.
Another demonstration has been organised by the Trades Council in the town centre on April 27, assembling on Eastgate at 10.30am, ending with a rally outside the town hall.
MPs Dan Jarvis and Michael Dugher will attend and address the rally.
The group plans to present the petition to council leader Steve Houghton ahead of the full council meeting next week and to Berneslai Homes at their next meeting at Westgate Plaza.
