Formal or informal associations of human beings, usually in pursuit of some common goal
- Foundation for Economic Education - One of the oldest free-market organizations in the U.S., founded in 1946 to study and advance the freedom philosophy
- Future of Freedom Foundation, The - Advances libertarian philosophy
- Federal Reserve System - The central bank of the United States
- Francisco Marroquín, Universidad - Teaches ethical, legal and economic principles of a free society
- Free State Project - Mission: "Liberty in Our Lifetime"
- Fully Informed Jury Association - Informs about rights, powers and responsibilities of trial jurors
- Florida, Libertarian Party of
- Foundation for Research on Economics & The Environment - Advances conservation by applying modern science and America's founding ideals
- Freedom Activist Network - Source of information about freedom and activism, aims to help freedom activists network with other activists
- Freedom Cruises - Sponsors Annual Freedom Cruise
- FreedomFest - Organizes annual gathering - "Where Free Minds Meet"
- Freedom House - Publishers of several freedom-related surveys and publications
- Freedom Summit - Organizes annual seminar - "Where the great minds of modern freedom come together"
- Friedrich Naumann Foundation - Promotes classical liberal policy and politics in Sub-Sahara Africa