In 2025, 11 US boys were named Dian, making it the 7,310th most common boys’ name of the year, down 1,814 places from #5,496 in 2024. That is 6 fewer than the 17 boys named Dian in 2024. Its best rank for boys was #3,865, reached in 1952. The most boys given the name in a single year was 20, in 2020. For comparison, it was #8,954 in 2015 and unranked in 1950.
Fewer than five US girls were named Dian in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #459, reached in 1946. That year also had the most girls given the name: 287. For comparison, it was #17,171 in 2015 and #637 in 1950.
Social Security card records list Dian in 101 years of the 146 from 1880 to 2025, starting in 1912 with 5 babies. In all, 5,578 US babies have been given the name, 96% of them girls and 3.7% boys. Its busiest decade was the 1940s, with 1,978 babies named Dian.
Over the 10 years from 2016 to 2025, 119 US boys were named Dian; the busiest of those years was 2020, with 20. In 2025 that was about 1 in 155,280 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Diane (520,034 babies since 1880), Diana (369,771 babies since 1880), Diann (12,252 babies since 1880) and Dia (2,367 babies since 1880).