This article reviews the composition and level of retirement income in the United States and how this has changed over time, focusing on two overlapping but distinct groups--the entire population aged 65 or older, and recent retirees. Changes in the composition of income of the aged over the past 20-30 years, including greatly expanded Social Security and pension coverage and an increasing number of persons with retirement savings, have improved the economic status of the aged not only in comparison with the aged in earlier years, but also in comparison with younger adults who derive most of their income from earnings. New retired workers are better off than the total aged population in several respects. The younger cohorts now in the labor force will spend more of their working lives in the more favorable conditions now present than was true of past new beneficiaries or the aged as a whole. It is, therefore, not unreasonable to expect that today's workers will enjoy more and larger pensions and increased income from savings to supplement their Social Security benefits when they retire.