Sierra Cooper
There are approximately 89 people named Sierra Cooper living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 3,851,172 Americans.
This estimate combines SSA birth records for the first name Sierra with Census Bureau frequency data for the surname Cooper. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
89
1 in 3,851,172
Named Sierra
98K
Alive today
Named Cooper
311K
Alive today
US population
343M
Denominator
Estimated living: 98K
Rarity: Uncommon
Gender: Female
Peak year: 1998
Average age: 26
Top Census group: White (63.5%)
Estimated bearers: 311K
Rarity: Common
Census rank: #72
Per 100K: 90.82
Top ancestry: White (65.2%)
First name trend
Sierra: popularity over time
Year-by-year SSA birth registrations for the first name Sierra. The peak year was 1998 with 5,853 births. The average person named Sierra today is 26 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Sierra
Self-reported race and ethnicity breakdown for people with the first name Sierra, from the 2020 US Census Bureau first-name tables. The largest published group is White at 63.5%.
The bar chart below shows how people with the first name Sierra described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the name Sierra at the time of the Census. A first name does not determine a person's race or ethnicity.
- White63.5% · 54,354
- Black or African American13.4% · 11,500
- Hispanic or Latino12.7% · 10,832
- Two or more races7.9% · 6,736
- American Indian and Alaska Native1.3% · 1,140
- Asian and Pacific Islander1.2% · 1,025
Ethnicity
Ancestry of the Cooper surname
Self-reported race and ethnicity breakdown for people with the surname Cooper, from the 2020 US Census Bureau. The largest group is White at 65.2%.
The bar chart below shows how people with the surname Cooper described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Cooper at the time of the Census. A surname does not determine a person's race or ethnicity.
- White65.2% · 177,090
- Black or African American25.4% · 68,875
- Two or more races4.6% · 12,463
- Hispanic or Latino3.5% · 9,396
- American Indian and Alaska Native0.7% · 1,941
- Asian and Pacific Islander0.6% · 1,688
Methodology
How we calculated this
The first name Sierra has a living-bearer frequency of 0.0285% of the US population, based on 97,738 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
Even though the Census Bureau now publishes first-name tables, we do not use that file as the main first-name input for this estimate. The latest first-name Census snapshot is from 2020, which makes it 6 years old today. Because Census first-name data is only released once every 10 years, SSA birth records plus CDC survival rates give a better current estimate of how many people are likely alive with the name Sierra right now.
The surname Cooper appears at a rate of 90.82 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0908%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 89 people with the full name Sierra Cooper. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people with the surname Cooper
FAQ
Sierra Cooper: questions and answers
How many people are named Sierra Cooper?
We estimate approximately 89 people in the United States share the full name Sierra Cooper. That works out to about 1 in 3,851,172 Americans. This is calculated by combining the first-name frequency (0.0285%) with the surname frequency (90.82 per 100K) against the current US population.
How rare is the name Sierra Cooper?
We classify Sierra Cooper as "Very Rare". About 1 in 3,851,172 Americans share this exact first and last name combination.
Is Sierra a male or female name?
Sierra is predominantly female. Out of 100,380 total SSA registrations, 0.3% were male and 99.7% were female. See the full Sierra profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How common is the name Sierra Cooper?
Want to know how common the name Sierra Cooper is? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.