The Maine Warden Service is a police agency in the United States State of Maine responsible for the enforcement of fisheries and wildlife laws, and the coordination of search and rescue in wilderness areas of the state. Maine's game wardens strive to protect the state's fishing and hunting resources, Enforcing strict limits on the activities listed above to keep animal populations stable. Maine's Warden Service is operationally part of Maine's Department of Inland Fisheries and Wildlife, it is the oldest conservation law enforcement agency in the United States.

A conservation officer is a law enforcement officer who protects wildlife and the environment. A conservation officer may also be referred to as an environmental technician/technologist, game warden, park ranger, forest watcher, forest guard, forester, gamekeeper, investigator, wilderness officer, wildlife officer, or wildlife trooper.