In 2025, 14 US girls were named Sydnee, making it the 7,852nd most common girls’ name of the year, up 1,643 places from #9,495 in 2024. That is 3 more than the 11 girls named Sydnee in 2024. Its best rank for girls was #540, reached in 2000. The most girls given the name in a single year was 506, in 2003. For comparison, it was #2,058 in 2015 and #4,692 in 1950.
Social Security card records list Sydnee in 65 years of the 146 from 1880 to 2025, starting in 1945 with 7 babies. In all, 8,255 US babies have been given the name, all of them girls. Its busiest decade was the 2000s, with 3,842 babies named Sydnee.
Over the 10 years from 2016 to 2025, 445 US girls were named Sydnee; the busiest of those years was 2016, with 105. In 2025 that was about 1 in 114,805 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Sydney (187,700 babies since 1880), Sidney (108,987 babies since 1880), Sydni (5,361 babies since 1880) and Sydnie (5,187 babies since 1880). Rarer spellings such as Cydnie are summarised on this page.