Unmarried births declined or held steady in every state, with teen births dropping sharply. Higher shares of unmarried births remained concentrated in parts of the South. Unmarried births have declined across the United States over the past decade, with new Census Bureau data showing that fewer than one-third of women who gave birth in 2023 were unmarried, down nearly five percentage points from 2011. By age, unmarried births remained most common among teenagers. Regionally, several states reported higher-than-average shares of recent births to unmarried women, including Alabama, Florida, Kentucky, Louisiana, Mississippi, Nevada, Ohio, South Carolina, Texas, and West Virginia.