Recorded 2007–2025 · United States
Oslo was most popular in 2022, when 94 American babies were given the name — ranking #3,726 that year. In 2025 it ranked #4,188, with 78 births. Across 1880–2025 the Social Security Administration has recorded 581 people named Oslo.
Oslo first appears in Social Security Administration records in 2007, which makes it about 18 years old as a recorded American name. It has been recorded in 18 of the 19 years since.
The Social Security Administration has recorded 581 American births named Oslo between 1880 and 2025. That is recorded US births, not a world population — it counts people issued a Social Security number at birth in the United States. Of those, roughly 576 are estimated to be alive today.
78 American babies were named Oslo in 2025, ranking #4,188 that year.
Oslo is rising. Across 2021–2025 it averaged 78 births a year, against 10 a year across 2011–2015 — a change of +684% over the decade.
Measured on recorded births. American births overall have fallen since 2007, so most established names lose births over any recent decade — a name can shed births and still hold its rank. Compare the rank above, which is measured against the other names of the same year.
Across the whole record Oslo is a boy’s name — 0.0% of the 581 Americans given it were girls and 100.0% were boys. In births since 2016 it is 0% girls and 100% boys.
Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.
Roughly 576 Americans named Oslo are alive today — 99% of everyone ever recorded with the name. The median is 4 years old, and half are between 2 and 7. That is a narrow band because Oslo is a young name — it only became common recently, so almost everyone carrying it is still a child or a young adult.
An estimate, not a count. Recorded births are carried forward through the Social Security Administration’s 2023 period life table, by age and sex. That table describes mortality in one recent year, so it credits the oldest cohorts with today’s survival rather than the harsher rates they actually lived through — the further back a name peaked, the more this will overstate how many remain. It counts people issued a Social Security number at birth, not immigrants who arrived later.
See Oslo on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org