Nearly one in three young adults ages 19 to 26 lacks health insurance coverage. This age group is at high risk of lacking insurance coverage because of low access to employer-sponsored insurance and subsidized public coverage. Given that so many uninsured young adults are low-income, significant public subsidies will be needed to address their uninsurance problem. Some policy options available include public program expansions, tax credits, direct subsidies, or individual mandates. Ultimately, decisions about allocating greater public subsidies for covering young adults or imposing mandates should be made in the context of considerations about broader health care reform.