In 2025, 65 US girls were named Kirby, making it the 2,671st most common girls’ name of the year, down 126 places from #2,545 in 2024. That is 5 fewer than the 70 girls named Kirby in 2024. Its best rank for girls was #526, reached in 1984. That year also had the most girls given the name: 367. For comparison, it was #4,924 in 2015 and #3,556 in 1950.
In 2025, 36 US boys were named Kirby, making it the 3,278th most common boys’ name of the year, down 695 places from #2,583 in 2024. That is 16 fewer than the 52 boys named Kirby in 2024. Its best rank for boys was #398, reached in 1954. The most boys given the name in a single year was 357, in 1957. For comparison, it was #2,377 in 2015 and #442 in 1950.
Social Security card records list Kirby in 143 years of the 146 from 1880 to 2025, starting in 1881 with 5 babies. In all, 18,495 US babies have been given the name, 21% of them girls and 79% boys. Its busiest decade was the 1950s, with 3,130 babies named Kirby.
Over the 10 years from 2016 to 2025, 497 US girls were named Kirby; the busiest of those years was 2024, with 70. In 2025 that was about 1 in 24,727 of the girls in SSA’s list for the year.
Among the states, Kirby ranked highest in Minnesota in 2025, at #788 for girls there. It was not in the top 100 of any state. Rarer spellings such as Kerby, Kirbie and Kirbi are summarised on this page.