Montreal Mayor Denis Coderre, Montreal police chief Marc Parent and Immigration Minister Kathleen Weil were among those on-hand for Monday's announcement.
Coderre said the city is aiming to strike balance "between openness and vigilance" while providing assistance to families, friends and stakeholders.
"Violent radicalization is a complex, multifaceted phenomenon," Coderre said in a statement.
"The city and its partners will deploy all resources required by the Prevention Centre to get it up and running as soon as possible. It must have means to put a stop to the radicalization process and to minimize the number of radicalized individuals who go on to commit violent acts."
The centre, the first of its kind in Montreal, will involve partners from various sectors, including health and social services, public safety and education.
Parent said it will serve for police as a "reference and expertise hub that will become operational within a few weeks."
"Its resources will be available to anyone who has questions or concerns about violent radicalization," he said.
A special prevention hotline will be active immediately at 514-280-2002.