In 2025, 337 US boys were named Magnus, making it the 765th most common boys’ name of the year, down 18 places from #747 in 2024. That is 6 fewer than the 343 boys named Magnus in 2024. Its best rank for boys was #719, reached in 2017. The most boys given the name in a single year was 354, in 2021. For comparison, it was #856 in 2015 and #2,938 in 1950.
Social Security card records list Magnus in 96 years of the 146 from 1880 to 2025, starting in 1890 with 5 babies. In all, 6,172 US babies have been given the name, all of them boys. Its busiest decade was the 2010s, with 2,389 babies named Magnus.
Over the 10 years from 2016 to 2025, 3,214 US boys were named Magnus; the busiest of those years was 2021, with 354. In 2025 that was about 1 in 5,068 of the boys in SSA’s list for the year.
Among the states, Magnus ranked highest in North Dakota in 2025, at #248 for boys there. It was not in the top 100 of any state. Rarer spellings such as Magno are summarised on this page.