John Frederick "Johnny" Mautz IV (born September 19, 1970) is an American politician who has served as a member of the Maryland Senate from District 37 since 2023.

[2] His father was stationed at Fort Devens before moving to the Eastern Shore of Maryland to start a dental care company.

Afterwards, he served as a Special Assistant to the Deputy Chief of Staff for Governor Bob Ehrlich from 2002 to 2005, and as legislative director for U.S. Representative Howard Coble from 2009 to 2014.

[15] During the 2019 legislative session, Mautz voted against a bill to raise the minimum wage to $15 an hour by 2025, which he worried was "too aggressive" of an increase for Eastern Shore business owners.

[18] In May 2024, Mautz called on Governor Wes Moore to veto a bill increasing subsidies for offshore wind energy.

[21] In January 2020, Mautz voted against overriding Governor Larry Hogan's veto on House Bill 720, which establishes a consensus-based process involving environmentalists, watermen and seafood sellers to create a new oyster fishery management plan for the state, citing concerns that the bill could cause economic harm to communities on the Chesapeake Bay.

[22] During the 2018 legislative session, Mautz introduced a bill to provide a tax break to individuals who donate venison to food programs.

[24][25] During the 2024 legislative session, Mautz introduced a bill prohibiting the Maryland Department of Natural Resources from reducing or altering oyster sanctuaries' boundaries.

In April 2018, Mautz voted in favor of House Bill 888, which restricts the sale and possession of bump stocks, and House Bill 1302, which authorizes a person to petition for an extreme risk prevention order with a court or law enforcement agency when it may be determined that a person is either an extreme risk to himself or to others.