In 2025, 66 US boys were named Sir, making it the 2,179th most common boys’ name of the year, down 210 places from #1,969 in 2024. That is 14 fewer than the 80 boys named Sir in 2024. Its best rank for boys was #1,467, reached in 2021. That year also had the most boys given the name: 123. For comparison, it was #2,383 in 2015 and unranked in 1950.
Social Security card records list Sir in 58 years of the 146 from 1880 to 2025, starting in 1967 with 5 babies. In all, 2,172 US babies have been given the name, all of them boys. Its busiest decade was the 2010s, with 613 babies named Sir.
Over the 10 years from 2016 to 2025, 888 US boys were named Sir; the busiest of those years was 2021, with 123. In 2025 that was about 1 in 25,880 of the boys in SSA’s list for the year.
Among the states, Sir ranked highest in Ohio in 2025, at #1,101 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Sire (1,715 babies since 1880), Zyir (811 babies since 1880) and Syre (642 babies since 1880). Rarer spellings such as Cire, Sirr and Syier are summarised on this page.