Lake St. Louis Police Department

Lake St. Louis Police Department is the municipal law-enforcement agency for the City of Lake St. Louis in St. Charles County, Missouri, based at 200 Civic Center Drive. The department serves residents, businesses, and visitors within Lake St. Louis limits in St. Charles County. Its area of responsibility covers patrol and response to calls for service, traffic enforcement, criminal investigations inside the city, and community policing programs that support local neighborhoods and commercial corridors. Lake St. Louis sits in a Missouri community corridor linking residential and commercial areas, and the police department is the primary local law-enforcement presence for day-to-day public safety inside the city. Public safety emergencies in Lake St. Louis should be reported by dialing 911.

According to the U.S. Census Bureau (ACS 2023), Lake St. Louis city, MO has an estimated population of 17,538.