How Many People Are Named Sienna Brown?

There are approximately 179 people named Sienna Brown living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 1,914,829 Americans.

This estimate combines SSA birth records for the first name Sienna 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

179

1 in 1,914,829 Americans

Combination Rarity

Uncommon

Very Rare Very Common

First Name

Sienna

Last Name

Brown

Est. Bearers 1,636,337

Census Rank #4

Per 100K 487.16

Rarity Very Common

Sienna: Popularity Over Time

Year-by-year SSA birth registrations for the first name Sienna. The peak year was 2024 with 2,113 births. The average person named Sienna today is 13 years old.

Male

Female

Ancestry of the Brown Surname

Self-reported race and ethnicity breakdown for people with the surname Brown, from the 2010 U.S. Census Bureau.

White

57.95%

Black

35.60%

Hispanic

2.52%

Asian/Pacific Islander

0.51%

American Indian/Alaska Native

0.87%

Two or More Races

2.55%

How we calculated this

The first name "Sienna" has an estimated frequency of 0.0107% 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 179 estimated people. This assumes first names and last names are statistically independent. Full methodology.

Other people named Sienna

Sienna Williams Sienna Miller

Other people with the surname Brown

Michael Brown James Brown John Brown David Brown Robert Brown William Brown Christopher Brown Joseph Brown

Sienna Brown: Questions and Answers

How many people are named Sienna Brown?

We estimate approximately 179 people named Sienna Brown are alive in the United States today. The first name Sienna is shared by 36,821 Americans, and the surname Brown is shared by 1,636,337.

How rare is the name Sienna Brown?

This name combination is classified as Uncommon, occurring at a rate of about 1 in 1,914,829 Americans. The first name Sienna is uncommon and the surname Brown is very common.

Is Sienna a male or female name?

Sienna is predominantly female, with 0.0% of bearers being male and 100.0% female. It peaked in popularity in 2024 and the average bearer today is 13 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.

How Many of Me

howmanyofme.org

There are 179 people with the name

Sienna Brown

in the United States

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