Fewer than five US girls were named Kathi in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #311, reached in 1954. The most girls given the name in a single year was 824, in 1958. For comparison, it was unranked (under five girls) in 2015 and #672 in 1950.
Social Security card records list Kathi in 60 years of the 146 from 1880 to 2025, starting in 1938 with 5 babies. In all, 10,109 US babies have been given the name, all of them girls. Its busiest decade was the 1950s, with 4,863 babies named Kathi.
In none of the 10 years from 2016 to 2025 were five or more US girls named Kathi.
Related spellings in the SSA files include Kathy (334,870 babies since 1880), Katie (241,784 babies since 1880), Cathy (170,646 babies since 1880) and Katy (20,957 babies since 1880).