Mountain States Legal Foundation (MSLF) is a nonprofit, public-interest legal foundation established in 1977. MSLF is dedicated to individual liberty, the right to own and use property, limited and ethical government, and the free enterprise system. Governed by a Board of Directors and Board of Litigation, MSLF defends its clients, which may be individuals, businesses, corporate entities, trade associations, or local units of government, pro bono in litigation—primarily against the federal government—in defense of constitutional liberties and the rule of law.

With its litigation on behalf of those who cannot afford private counsel (or whose goals with their litigation does not justify the expense of private counsel) MSLF seeks: 1) victory for its clients at the highest level possible, including the Supreme Court of the United States; 2) establishment of binding legal precedents that will benefit millions of Americans; and 3) education of the American public on the threat to their liberties that unrestrained government presents.