In 2025, 240 US girls were named Kassidy, making it the 1,039th most common girls’ name of the year, down 57 places from #982 in 2024. That is 25 fewer than the 265 girls named Kassidy in 2024. Its best rank for girls was #314, reached in 2000. That year also had the most girls given the name: 1,007. For comparison, it was #465 in 2015 and unranked in 1950.
Social Security card records list Kassidy in 50 years of the 146 from 1880 to 2025, starting in 1975 with 6 babies. In all, 21,715 US babies have been given the name, 98% of them girls and 2.0% boys. Its busiest decade was the 2000s, with 7,885 babies named Kassidy.
Over the 10 years from 2016 to 2025, 4,172 US girls were named Kassidy; the busiest of those years was 2016, with 621. In 2025 that was about 1 in 6,697 of the girls in SSA’s list for the year.
Among the states, Kassidy ranked highest in Mississippi in 2025, at #412 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Cassidy (64,583 babies since 1880) and Cassady (1,172 babies since 1880). Rarer spellings such as Kassidee, Kassidie and Kassadi are summarised on this page.