Fewer than five US girls were named Diann in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #338, reached in 1947. That year also had the most girls given the name: 557. For comparison, it was unranked (under five girls) in 2015 and #363 in 1950.
Social Security card records list Diann in 79 years of the 146 from 1880 to 2025, starting in 1924 with 5 babies. In all, 12,252 US babies have been given the name, all of them girls. Its busiest decade was the 1950s, with 4,627 babies named Diann.
In none of the 10 years from 2016 to 2025 were five or more US girls named Diann.
Related spellings in the SSA files include Dianne (95,475 babies since 1880), Dianna (56,356 babies since 1880), Dian (5,578 babies since 1880) and Diane (520,034 babies since 1880). Rarer spellings such as Diahann and Diyaan are summarised on this page.