Hundreds of supporters plan to protest over the departure of Kevin Keegan, who stepped down as manager after his authority was alleged to have been undermined by the Newcastle board.
As many as five separate demonstrations may take place in Newcastle city centre before, during and after the Magpies' home game against Hull on Saturday.
Northumbria Police said extra officers will be on duty and urged fans to vent their frustration peacefully.
A spokesman said: "The safety of the public remains top of our agenda at all football games throughout the season. The forthcoming game on Saturday is no different, policing levels will always be adjusted according to any intelligence about possible disorder.
"We are aware that there is the potential for protest on Saturday and we will facilitate lawful and peaceful protest."