Dunkirk is generally a safe city for solo female travelers. There's a good level of security, and locals are usually friendly and helpful. It's important to exercise the usual precautions like avoiding isolated areas at night and being aware of your surroundings, but the city typically enjoys a relaxed and peaceful atmosphere. Petty crime like pickpocketing can occur, especially around tourist hotspots, but these instances are relatively low. It's still advisable to take sensible precautions to protect your belongings.