The City of Marengo police department is on duty all day, every day. Special districts provide rescue squad and fire suppression services. The Marengo Fire Protection District has obtained an ISO insurance rating of three, the best in the area. This lowers the cost of insurance on your business and residents. The lower insurance is a direct result of the equipment, training and readiness of the district. The Marengo Rescue Squad District has over 26 paramedics and 7 EMTs. Most of the firefighters and rescue personal volunteer their service.