The James Madison Institute (JMI) is a conservative American think tank headquartered in Tallahassee, Florida in the United States.

[8][9] The institute works to promote small government solutions to the fast changing technological environment.

[12] The institute believes that direct personal responsibility for health care controls costs and provides individuals with incentives to make healthy choices.

JMI supports reforms that emphasize low tax rates and less government spending.

JMI is a member of the advisory board of Project 2025,[14] a collection of conservative and right-wing policy proposals from the Heritage Foundation to reshape the United States federal government and consolidate executive power should the Republican nominee win the 2024 presidential election.