Is Nicolai a boy or girl name?

Nicolai is a boy’s name. Of the 1,865 Americans recorded with the name since 1880, 0.0% were girls and 100.0% were boys.

Name Legacy

Nicolai

Recorded 1962–2025 · United States

Nicolai was most popular in 2015, when 78 American babies were given the name — ranking #4,147 that year. In 2025 it ranked #5,540, with 51 births. Across 1880–2025 the Social Security Administration has recorded 1,865 people named Nicolai.

Nicolai over time

Births per year. The dot marks Nicolai’s peak in 2015. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Nicolai a boy’s or a girl’s name?

Across the whole record Nicolai is a boy’s name — 0.0% of the 1,865 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.

Names that peaked alongside Nicolai

Where Nicolai is most concentrated

How much more common the name is in each state than across the country as a whole.

Explore further

See Nicolai on the interactive charts

Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org