How Many People Are Named Molly Brown?
There are approximately 718 people named Molly Brown living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 477,374 Americans.
This estimate combines SSA birth records for the first name Molly with Census Bureau frequency data for the surname Brown. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.
Estimated People with This Name
718
1 in 477,374 Americans
Combination Rarity
Uncommon
First Name
View full profileMolly
Last Name
View full profileBrown
Molly: Popularity Over Time
Year-by-year SSA birth registrations for the first name Molly. The peak year was 1991 with 4,663 births. The average person named Molly today is 32 years old.
Ancestry of the First Name Molly
In the 2020 Census, the first name Molly was most commonly recorded among people who identified as White (90.94%). The next largest recorded groups were Hispanic (3.23%) and Two or More Races (2.45%).
These percentages describe the people who had the first name Molly in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.
Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Molly rose or fell over time.
Ancestry of the Brown Surname
The surname Brown was most commonly recorded among people who identified as White in the 2020 Census.
This is a self-reported race and ethnicity breakdown for people who had the surname Brown in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.
How we calculated this
The first name "Molly" has an estimated frequency of 0.0452% 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 463.73 per 100,000 people in the 2020 U.S. Census.
We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Molly are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 718 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Molly
Other people with the surname Brown
Molly Brown: Questions and Answers
How many people are named Molly Brown?
We estimate approximately 718 people named Molly Brown are alive in the United States today. The first name Molly is shared by 154,836 Americans, and the surname Brown is shared by 1,589,457.
How rare is the name Molly Brown?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 477,374 Americans. The first name Molly is common and the surname Brown is very common.
Is Molly a male or female name?
Molly is predominantly female, with 0.2% of bearers being male and 99.8% female. It peaked in popularity in 1991 and the average bearer today is 32 years old.
What does the Census say about the first name Molly?
In the 2020 Census, the first name Molly was most commonly recorded among people who identified as White (90.94%). The next largest recorded groups were Hispanic (3.23%) and Two or More Races (2.45%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.
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. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.
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