Using data from the 1999 National Survey of America's Families, this brief provides details of uninsurance among low-income workers in 13 states. States with relatively high rates of uninsurance among low-income workers tend to have greater than average proportions of: Hispanics (both citizens and noncitizens); workers in fair or poor health; and workers in agriculture and construction. The research did not find differences in uninsurance among low-income workers by employer size. The brief reviews uninsurance rates for low-income workers across 13 states by race/ethnicity/citizenship, health status, employer size, industry, and employment status.