In 2025, 12 US girls were named Cathy, making it the 8,463rd most common girls’ name of the year, down 2,473 places from #5,990 in 2024. That is 8 fewer than the 20 girls named Cathy in 2024. Its best rank for girls was #34, reached in 1958. That year also had the most girls given the name: 10,942. For comparison, it was #2,749 in 2015 and #75 in 1950.
Social Security card records list Cathy in 108 years of the 146 from 1880 to 2025, starting in 1918 with 5 babies. In all, 170,646 US babies have been given the name, 99.7% of them girls and 0.2% boys. Its busiest decade was the 1950s, with 82,859 babies named Cathy.
Over the 10 years from 2016 to 2025, 289 US girls were named Cathy; the busiest of those years was 2016, with 53. In 2025 that was about 1 in 133,939 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), Kathy (334,870 babies since 1880) and Katie (241,784 babies since 1880). Rarer spellings such as Caity, Cathia and Cathee are summarised on this page. The open nickname list we use links it to Catherine, Cathleen and Kathy.