There is growing media and public interest in the rise in solo living in South Korea, where family ties have traditionally been strong. Using individual-level data from the 2% microsamples of the Korean Population and Housing Census for 1980, 1990, 2000, 2010, and 2020, we examine trends in the prevalence of living alone across five 10-year age groups (25-34 through 65-74) for men (N=1,258,115) and women (N=1,311,326) over four decades. We focus on educational differences in solo living, particularly between college graduates and those with a high school education or less. The results show an increase in solo living across all age groups and both genders, regardless of educational attainment. However, among younger adults (25-34), college graduates have experienced faster growth in solo living, making them more likely to live alone than their lower-educated counterparts in 2020. In contrast, among older adults (65-74), those without a college degree show larger increases, making them more likely to live alone than their college-educated counterparts in recent years. The implications of these educational divergences in living alone are discussed within the broader context of family changes in contemporary Korea