The City of Sarnia is a lower-tier municipality within the County of Lambton. Please view the links below to access additional services. Additional Services Bird Friendly City Community Improvement Opportunities Community Partners County of Lambton County of Lambton Housing Services Homelessness and addictions Indemnification Agreement Lambton County Library Lambton Public Health La ville de Sarnia Parks & Recreation Master Plan R-Zone: Respect & Responsibility Sarnia Police Service