A mass protest is being held outside a Gloucester bail hostel where high-risk offenders are due to be housed.
The bail hostel could take category A offenders from October
Category A offenders such as murderers, rapists and paedophiles could be placed at the Ryecroft premises from October.
Saturday's protest by local residents and traders comes 14 years after the murder of local council worker Anna McGurk by an inmate at the hostel.
The Probation Service said anyone thought to pose a threat to the public would not be admitted.
The campaign is being led by a residents' group called Community Against Ryecroft Policy (CARP).
Members said Ryecroft was not the right place for such offenders because there were several schools, a city farm and many young and vulnerable families in the area.
Dave Berry, the hostel manager, said each offender would be rigorously checked by a panel of experts.
He said: "Decisions will be taken first as to whether we can manage that individual's safely and whether we can do anything to effect change in his behaviour.
"If either criteria is not met, we will not accept him."