"Senior Citizens Higher Education Act Section §23-38.56 of the Code of Virginia (also known as the Senior Citizens Higher Education Act) states that Virginians age 60 and older may take college courses without paying tuition. Older citizens may register for and enroll in courses in any state institution of higher education (subject to the admission requirements of the institution) as a full-time or part-time student for academic credit if their federal taxable income does not exceed $15,000 per year. The State Council of Higher Education (SCHEV) has details of the Senior Citizen Tuition Waiver . Virginians age 60 and older, regardless of income, may register for and audit courses in any Virginia institution of higher education. Students may have to pay for course materials and laboratory fees. For more information, contact the admissions office of the state college or university nearest you. SCHEV offers a listing of state colleges and universities."
This is a comprehensive guide of all colleges in all states that provide reduced or free tuition for senior citizens.