Rovers have lost their last five games, conceding 13 goals, and are three points from safety with just four fixtures remaining.
Back-to-back wins over Wolves and Sunderland last month appeared to have lifted the club out of trouble but their current run has dropped them back in and angry fans are stepping up their campaign with more protests against owners Venky's and manager Steve Kean.
"To the people of Blackburn, this is no longer just about losing football matches, this is about the very future of the football club and the very fabric of Blackburn," said a statement from the BRFC Action Group.
"Our football club is a 137-year-old institution which has seen its traditions and values destroyed in less than 18 months.
"It takes only a few hands to bulldoze our club but it will take many hands to rebuild it and the whole community needs to come together to breathe life back into Blackburn Rovers.
"Venkys cannot make us feel inferior if we do not give them our consent.
"Words divide us, actions unite us and if we are unified there is nothing that we cannot achieve."
The BRFC's "community march" will leave Blackburn Town Hall at 1.30pm on Saturday and proceed to Ewood Park.