In 2025, 60 US girls were named Reilly, making it the 2,855th most common girls’ name of the year, down 141 places from #2,714 in 2024. That is 4 fewer than the 64 girls named Reilly in 2024. Its best rank for girls was #623, reached in 1998. That year also had the most girls given the name: 379. For comparison, it was #2,137 in 2015 and unranked in 1950.
In 2025, 48 US boys were named Reilly, making it the 2,708th most common boys’ name of the year, up 114 places from #2,822 in 2024. That is 2 more than the 46 boys named Reilly in 2024. Its best rank for boys was #806, reached in 1997. The most boys given the name in a single year was 218, in 2007. For comparison, it was #1,800 in 2015 and unranked in 1950.
Social Security card records list Reilly in 52 years of the 146 from 1880 to 2025, starting in 1953 with 6 babies. In all, 10,088 US babies have been given the name, 55% of them girls and 45% boys. Its busiest decade was the 2000s, with 4,353 babies named Reilly.
Over the 10 years from 2016 to 2025, 712 US girls were named Reilly; the busiest of those years was 2016, with 99. In 2025 that was about 1 in 26,788 of the girls in SSA’s list for the year.
Among the states, Reilly ranked highest in New Jersey in 2025, at #1,139 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Riley (246,985 babies since 1880) and Reiley (942 babies since 1880). Rarer spellings such as Reyly and Reili are summarised on this page.