In 2025, 48 US girls were named Kathy, making it the 3,274th most common girls’ name of the year, down 566 places from #2,708 in 2024. That is 16 fewer than the 64 girls named Kathy in 2024. Its best rank for girls was #14, reached in 1958. That year also had the most girls given the name: 23,938. For comparison, it was #1,690 in 2015 and #38 in 1950.
Social Security card records list Kathy in 113 years of the 146 from 1880 to 2025, starting in 1910 with 5 babies. In all, 334,870 US babies have been given the name, 99.7% of them girls and 0.2% boys. Its busiest decade was the 1950s, with 158,226 babies named Kathy.
Over the 10 years from 2016 to 2025, 839 US girls were named Kathy; the busiest of those years was 2016, with 159. In 2025 that was about 1 in 33,485 of the girls in SSA’s list for the year.
Related spellings in the SSA files include Catherine (669,611 babies since 1880), Katherine (652,750 babies since 1880), Katie (241,784 babies since 1880) and Cathy (170,646 babies since 1880). Rarer spellings such as Kathe, Katty and Kathya are summarised on this page.