The O'Fallon Police Department is located at the east entrance of the O'Fallon Municipal Centre in the same building as City Hall. The department is comprised of 103 officers who serve the community through several divisions of law enforcement including detective, traffic and Cyber crime units, patrol, animal control and a K-9 unit. The department also provides a CERT program and assists local businesses through a Business Watch program. O'Fallon officers serve as school resource officers for area schools and participate in several programs for the city's youth, including D.A.R.E and Explorers.