How Many People Are Named Sinclair?
An estimated 1,277 people in the United States have the first name Sinclair. It is used for both genders, with 76.0% male. The average bearer is 38 years old, and Sinclair peaked in popularity in 2024 with 41 births that year.
Below you will find a full statistical profile of Sinclair as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Sinclair paired with any surname.
Estimated Living Americans
1,277
About 1 in 268,406 people in the U.S.
Rarity
Rare
Predicted Gender
Male
76.0% confidence
Average Age
38
years old
Peak Year
2024
41 births
Total Registered
1,869
since 1880
Gender Distribution for Sinclair
Sinclair is a genuinely unisex name, used for both males (76.0%) and females (24.0%). Out of 1,869 total births registered, 1,421 were male and 448 were female.
Sinclair as a male name
Ranked #6,755 in 2024
13 male births in 2024
Peak: 1924 (29 births)
Sinclair as a female name
Ranked #4,857 in 2024
28 female births in 2024
Peak: 2024 (28 births)
Sinclair: Popularity Over Time
SSA records for Sinclair span from the 1900s to the 2020s, covering 13 decades of naming data. The most popular decade for this name was the 1990s, when 221 babies were registered. While Sinclair is less common than at its peak in the 1990s, it remains a well-established name with steady registrations.
Sinclair by Decade
How has Sinclair tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Sinclair by State
Birth registrations for Sinclair span all 7 states and territories in the SSA database. The highest counts are in South Carolina, New York, Florida. The lowest are in North Carolina, Georgia, California. On average, about 20 Sinclairs were registered per state.
Sinclair + Last Name Combinations
How many people share a full name with Sinclair as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Sinclair
Other first names starting with S with a similar number of bearers.
Sinclair: Questions and Answers
How many people in the U.S. are named Sinclair?
We estimate approximately 1,277 people named Sinclair are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 268,406 Americans share this first name.
Is Sinclair a common name?
Sinclair is classified as "Rare" and is more popular than 91.6% of all first names in the SSA database. A total of 1,869 births have been registered with this name since 1880.
When was Sinclair most popular?
Sinclair reached peak popularity in 2024, when 41 babies were given this name. The average age of a living person named Sinclair is approximately 38 years old, reflecting when the name was most commonly given.
Is Sinclair a male name?
Sinclair is predominantly male. 76.0% of people with this name are male. See the gender breakdown above for full details.
How many Sinclair Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Sinclair Smith, Sinclair Johnson, Sinclair Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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