How Many People Are Named Sierra Brown?
There are approximately 476 people named Sierra Brown living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 720,072 Americans.
This estimate combines SSA birth records for the first name Sierra with Census Bureau frequency data for the surname Brown. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
476
1 in 720,072 Americans
Combination Rarity
Uncommon
First Name
View full profileSierra
Last Name
View full profileBrown
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.
Ancestry of the Brown Surname
Self-reported race and ethnicity breakdown for people with the surname Brown, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Sierra" has an estimated frequency of 0.0285% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Brown" appears at a rate of 487.16 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 476 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Sierra
Other people with the surname Brown
Sierra Brown: Questions and Answers
How many people are named Sierra Brown?
We estimate approximately 476 people named Sierra Brown are alive in the United States today. The first name Sierra is shared by 97,738 Americans, and the surname Brown is shared by 1,636,337.
How rare is the name Sierra Brown?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 720,072 Americans. The first name Sierra is uncommon and the surname Brown is very common.
Is Sierra a male or female name?
Sierra is predominantly female, with 0.3% of bearers being male and 99.7% female. It peaked in popularity in 1998 and the average bearer today is 26 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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