The Institute for Justice (IJ) is a libertarian non-profit public interest law firm in the United States. It has litigated twelve cases before the United States Supreme Court dealing with eminent domain, interstate commerce, public financing for elections, school vouchers, tax credits for private school tuition, civil asset forfeiture, and residency requirements for liquor license. The organization was founded on September 3, 1991. As of 2023, it employed a staff of 157 full-time staff members in Arlington, Virginia, and seven offices across the United States.