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, state-by-state birth registrations, and, when available, a 2020 Census snapshot showing who had the name at that point in time. 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 in the 2020 Census
The 2020 Census recorded 1,242 people with the first name Sinclair, which placed it at #10,628 in the published first-name tables. This is a snapshot of people who already had the name in 2020. The estimated living count elsewhere on this page is different: it is a current estimate built from SSA birth records and age-based survival rates, so the two figures are not expected to match exactly.
Read this section as a snapshot of people who already had the name in 2020. The SSA charts elsewhere on this page are still the better way to see how the name rose, fell, or shifted across generations.
Gender in the 2020 Census
In the 2020 Census, Sinclair was recorded as predominantly male. Out of 1,242 people with this name in that snapshot, 65.9% were male and 34.1% were female. That is less heavily male than the long-run SSA birth pattern on this page, which sits at 76.0% male.
Census Count
1,242
people with this name
Census Rank
#10,628
among Census first names
Frequency Rate
0.41
per 100,000 people
Recorded Race and Hispanic Origin in the 2020 Census
In the 2020 Census, the first name Sinclair was most commonly recorded among people who identified as Black (48.99%). The next largest recorded groups were White (33.20%) and Hispanic (6.20%).
These percentages describe the people who had the first name Sinclair in the 2020 Census. They do not tell you the deeper meaning or origin of the name itself.
2020 Census demographic breakdown
Each row shows a recorded Census category for people with the first name Sinclair.
| Group | Share | Count |
|---|---|---|
| Black | 48.99% | 608 |
| White | 33.20% | 412 |
| Hispanic | 6.20% | 77 |
| Asian and Pacific Islander | 5.72% | 71 |
| Two or More Races | 5.40% | 67 |
| American Indian and Alaska Native | 0.48% | 6 |
The Census published separate sex and race/origin tables for first names, so their total counts can differ slightly for the same name. That is why the race section focuses on the demographic mix rather than repeating a second headline count.
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.
How common was Sinclair in the 2020 Census?
The 2020 Census recorded 1,242 people with the first name Sinclair. That placed it at #10,628 in the published Census first-name tables, or 0.41 people per 100,000.
Why is the Census count different from the living estimate?
Because they measure different things. The Census number is a count of people with the name in 2020. The living estimate is a current model based on SSA birth records and survival rates, so it aims to estimate how many people with the name are alive now.
What does the SSA popularity chart show?
The popularity chart tracks birth registrations, not people currently alive. It shows how often Sinclair was given to babies from 1880 through 2024, which is why it is the best tool on the page for seeing long-run naming trends.
What does the Census say about the gender split for Sinclair?
In the 2020 Census snapshot, Sinclair was recorded as predominantly male. The published split was 65.9% male and 34.1% female.
What does the Census say about the background of people named Sinclair?
In the 2020 Census, the first name Sinclair was most commonly recorded among people who identified as Black (48.99%). The next largest recorded groups were White (33.20%) and Hispanic (6.20%). These percentages describe the people who had the name in the 2020 Census, not the deeper meaning or origin of the name itself.
Why can the Census sex total and race total differ slightly?
The Census published separate first-name tables for sex and for race and Hispanic origin. Those totals can differ slightly for the same name, so the page uses them as two related snapshots rather than treating them as perfectly interchangeable counts.
Does every first name have Census demographic data?
No. The public Census first-name tables only include names that met the Bureau's publication rules. That means some names on this site will have SSA history but no published Census demographic snapshot.
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.
Why can Sinclair have a lot of living bearers even if it is not trendy now?
Because a name can build up a large population over many decades. Sinclair peaked in 2024, and the average living bearer is about 38 years old, so a name can still have millions of living bearers even after it stops feeling current for newborns.
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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