How Many People Are Named Sinclair?
people named Sinclair are alive in the United States today (estimate)
About 1 in 268,276 people in the US has this name
Based on 1,912 babies named Sinclair in Social Security records from 1900 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
43 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
From a surname which was derived from a Norman French town called "Saint CLAIR". A notable bearer was the American author Sinclair Lewis (1885-1951).
Source of the meaning, origin, pronunciation and related names: Behind the Name.
Related & Similar Names
⚧ Gender Distribution
Of the babies given the name Sinclair, 37.1% were girls and 62.9% were boys. The share of girls among babies named Sinclair rose from 0% in the 1910s to 68% in the 2020s.
👥 Age Distribution
The average person named Sinclair alive today is about 34 years old, and 48% are under 30. Half of them were between 13 and 51 in 2025.
📈 Popularity Over Time
Sinclair first appears in the records in 1900, and 2025 was its biggest year so far, with 43 babies.
Babies given the name each year, 1900 to 2025
🏆 Rank History
Sinclair has never been one of the 100 most popular boys' names. Its best rank was #1,039, in 1900. In 2025 it ranked #6,396. Among girls, its best rank was #4,666, in 1994.
| Boys | Girls | |
|---|---|---|
| Rank in 2025 | #6,396 | #4,739 |
| Best rank | #1,039 (1900) | #4,666 (1994) |
| Years in the top 100 | None | None |
| Rank in its biggest decade | #1,764 in the 1920s | #9,065 in the 2010s |
📍 State-Wise Distribution
People named Sinclair alive today, by the state where they were born (estimate; state records start in 1910).
More people named Sinclair were born in South Carolina than in any other state: about 29 of those alive today. Compared with the national rate in the same years, Sinclair was given about 36.6 times as often in South Carolina.
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