David Martin McIntosh (born June 23, 1958, in Fort Wayne, Indiana) is an American attorney, lobbyist, and conservative political figure known for his commitment to libertarian-leaning conservatism and free-market policies. He graduated from the University of Notre Dame with a Bachelor of Arts in 1980 and earned his Juris Doctor from the University of Chicago Law School in 1983. Early in his career, McIntosh served as a legislative aide to U.S. Senator Dan Quayle and worked as an attorney-advisor at the Federal Trade Commission during the Reagan administration.

He entered politics as part of the 1994 Republican Revolution, winning election to the U.S. House of Representatives for Indiana's 2nd congressional district, where he served from 1995 to 2001. As a congressman, McIntosh was a staunch advocate for limited government, tax cuts, and deregulation, aligning with the Contract with America initiatives. After leaving Congress, he founded the lobbying firm McIntosh & Lenzini, representing clients in the energy, telecommunications, and healthcare sectors.

McIntosh later transitioned into conservative advocacy, serving as a senior fellow at the Claremont Institute and contributing to various policy organizations. In 2010, he became president of the Club for Growth and the Club for Growth Foundation, prominent conservative advocacy groups focused on economic issues, free-market policies, lower taxes, and reduced government spending. Under his leadership, these organizations have influenced Republican primaries and policy debates by endorsing fiscal conservatives and opposing establishment figures. He has also been involved in networks of conservative donors and influencers, including ties to the Koch brothers' funding ecosystem and sponsorships from figures like Dan Wilks.

McIntosh's career reflects a dedication to advancing limited government principles through strategic political funding and advocacy. While he has not faced major legal controversies, his efforts, especially with the Club for Growth, have drawn criticism from opponents who view his primary challenges as overly aggressive and potentially divisive within the Republican Party. He has also been targeted by progressive groups for opposing healthcare reform and environmental regulations. McIntosh primarily resides in Indiana and Washington, D.C., and continues to shape conservative influence networks through his leadership roles and political activities.