In 2025, 59 US boys were named Merlin, making it the 2,343rd most common boys’ name of the year, down 271 places from #2,072 in 2024. That is 14 fewer than the 73 boys named Merlin in 2024. Its best rank for boys was #288, reached in 1927. That year also had the most boys given the name: 389. For comparison, it was #3,284 in 2015 and #507 in 1950.
In 2025, 14 US girls were named Merlin, making it the 7,758th most common girls’ name of the year, up 523 places from #8,281 in 2024. That is 1 more than the 13 girls named Merlin in 2024. Its best rank for girls was #1,608, reached in 1901. The most girls given the name in a single year was 30, in 2003. For comparison, it was #9,324 in 2015 and unranked in 1950.
Social Security card records list Merlin in 134 years of the 146 from 1880 to 2025, starting in 1885 with 6 babies. In all, 15,968 US babies have been given the name, 5.8% of them girls and 94% boys. Its busiest decade was the 1920s, with 3,435 babies named Merlin.
Over the 10 years from 2016 to 2025, 569 US boys were named Merlin; the busiest of those years was 2024, with 73. In 2025 that was about 1 in 28,950 of the boys in SSA’s list for the year.
Among the states, Merlin ranked highest in Indiana in 2025, at #819 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Merlyn (5,045 babies since 1880) and Merlene (2,379 babies since 1880). Rarer spellings such as Merline, Merlon and Merleen are summarised on this page.