The mission statement of the Mercer County Sheriff's Office is as follows:
"The fundamental duty and ultimate mission of the Mercer County Sheriff's Office is to serve and protect the citizens of Mercer County with fairness, compassion, and respect. We demand excellence in our law enforcement personnel, stressing professionalism, integrity, and timeliness so that the citizens we serve may feel safe and secure within the boundaries of our County. The enforcement of the law and the protection we provide shall always be without favor or prejudice. We promote goals in partnership with our community and prioritize and address problems based on the community's concerns. We are committed to continuous improvement in law enforcement, promoting and utilizing the most modern techniques available."