OBJECTIVES:: To compare gender differences in alcohol use and the socioeconomic correlates of at-risk drinking among middle-aged and older adults in Australia, the United States (US) and South Korea. METHOD:: Data were drawn from large nationally representative surveys of people aged 45 years and older, collected in 2006. RESULTS:: Rates of any drinking and at-risk drinking (>14 US standard drinks/week) were higher for males than females in all countries and these gender differences were largest in Korea. Socioeconomic differentials for at-risk drinking varied by country and gender. In the US, at-risk drinking was associated with lower educational levels among men, but higher educational levels among women; in Korea, it was associated with being unpartnered, particularly for women; and in Australia, at-risk drinking was associated with higher income. CONCLUSIONS:: Gender-role expectations differ between countries and may influence both the levels at which older adults consume alcohol and the ways in which at-risk drinking is associated with socioeconomic factors. IMPLICATIONS:: Heavy alcohol use in middle-aged and older adults is a cause for concern. Health promotion strategies should target older age groups and consider the ways in which gender, marital status and education influence norms and opportunities for risky alcohol use.