Adult children are a crucial source of care for frail older Americans, especially for widowed and divorced people who cannot turn to spouses for help. Informal care options are limited for frail unmarried adults without children, however. Some may turn to friends, charitable organizations, or other family members for help. Others may purchase home care from paid providers. But some frail childless adults may receive inadequate care in the community or be pushed into nursing homes. Although most people with long-term care needs have children who can provide help, declining fertility rates will increase the number of frail childless Americans in coming decades. This article examines the receipt, amount, and source of care for frail older adults without children and compares their care to that received by older adults with children.