John C. Klimm (born November 5, 1955) is an American municipal administrator and politician.

[6] On June 23, 2011, the Barnstable Town Council voted 6 to 5 to end Klimm's contract early.

[6] In 2014, Portsmouth became only the second Rhode Island community ever to receive a AAA Bond rating from Standard & Poor's.

[7] He did not seek a new contract in 2014 and later accepted the city manager's position in Aiken, South Carolina.

[9] In addition to his work as Town Administrator, Klimm has also worked as an adjunct professor at Suffolk University's Sawyer Business School, where he taught courses in labor relations, state government management, managing public organizations, and administration of local government.