In the TV series Twin Peaks, what is the name of the sheriff who assists Dale Cooper?

Harry S. Truman is the sheriff who assists Dale Cooper in the TV series Twin Peaks. Truman leads the local police department and becomes Cooper’s principal ally during the investigation into Laura Palmer’s murder.

The character is played by Michael Ontkean in the original series and by Robert Forster in Twin Peaks: The Return. Truman’s name is a deliberate allusion to former U.S. president Harry S. Truman, but the fictional sheriff is a Pacific Northwest law-enforcement officer rather than a historical figure.

Truman is portrayed as practical, loyal, and deeply familiar with the people and geography of Twin Peaks. His knowledge of the town helps Cooper navigate suspects, family connections, and unexplained events. Their partnership is one of the show’s central working relationships.

The name can be confused with Agent Cooper’s first name, Dale, or with Deputy Andy Brennan. Andy is a member of Truman’s department, while Truman is the sheriff in command.