Magnus has been given to about 6,172 people in the United States since 1880. It was most common in 2021, which makes it a current name.
Magnus ranks 765th among American boys in 2025, with 337 born that year. Its best year was 2021, when 354 babies were given the name, ranking 730th. The typical living American called Magnus is about 9 years old today. It is relatively most common in North Dakota, where it accounts for 0.08% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.