In 2025, 9 US girls were named Kassi, making it the 10,494th most common girls’ name of the year, down 1,255 places from #9,239 in 2024. That is 2 fewer than the 11 girls named Kassi in 2024. Its best rank for girls was #1,265, reached in 1986. That year also had the most girls given the name: 107. For comparison, it was #13,718 in 2015 and unranked in 1950.
Social Security card records list Kassi in 57 years of the 146 from 1880 to 2025, starting in 1966 with 6 babies. In all, 2,110 US babies have been given the name, all of them girls. Its busiest decade was the 1980s, with 802 babies named Kassi.
Over the 10 years from 2016 to 2025, 89 US girls were named Kassi; the busiest of those years was 2016, with 15. In 2025 that was about 1 in 178,585 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Cassie (47,027 babies since 1880), Kasey (45,949 babies since 1880), Kaci (10,183 babies since 1880) and Kassie (7,034 babies since 1880).