Americans for Prosperity (AFP) is a political advocacy and grassroots organization founded in 2004 by David and Charles Koch. It focuses on educating and mobilizing citizens to support free-market policies, limited government, fiscal responsibility, and entrepreneurship. AFP operates as a 501(c)(4) nonprofit and has a related super PAC, Americans for Prosperity Action, which backs political candidates aligned with its mission.

With 36 state chapters and over 140 offices, AFP engages approximately 40 million activists across the country. The organization emphasizes community organizing, education, policy advocacy, and political campaigning. It provides training programs, policy research, and mobilization efforts to influence legislation and hold public officials accountable. In 2023, AFP reported revenues of $186 million and claims over 300 legislative victories, showcasing its significant grassroots impact and reach.