Molly Callahan
There are approximately 25 people named Molly Callahan living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 13,710,174 Americans.
This estimate combines SSA birth records for the first name Molly with Census Bureau frequency data for the surname Callahan. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
25
1 in 13,710,174
Named Molly
155K
Alive today
Named Callahan
56K
Alive today
US population
343M
Denominator
Estimated living: 155K
Rarity: Common
Gender: Female
Peak year: 1991
Average age: 32
Top Census group: White (90.9%)
Estimated bearers: 56K
Rarity: Uncommon
Census rank: #682
Per 100K: 16.35
Top ancestry: White (86.8%)
First name trend
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.
Babies born per year
Demographics
Ancestry and ethnicity for Molly
Self-reported race and ethnicity breakdown for people with the first name Molly, from the 2020 US Census Bureau first-name tables. The largest published group is White at 90.9%.
The bar chart below shows how people with the first name Molly 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 Molly at the time of the Census. A first name does not determine a person's race or ethnicity.
- White90.9% · 139,560
- Hispanic or Latino3.2% · 4,961
- Two or more races2.5% · 3,765
- Asian and Pacific Islander2.0% · 3,145
- Black or African American0.9% · 1,393
- American Indian and Alaska Native0.4% · 635
Ethnicity
Ancestry of the Callahan surname
Self-reported race and ethnicity breakdown for people with the surname Callahan, from the 2020 US Census Bureau. The largest group is White at 86.8%.
The bar chart below shows how people with the surname Callahan 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 Callahan at the time of the Census. A surname does not determine a person's race or ethnicity.
- White86.8% · 42,404
- Black or African American5.2% · 2,550
- Two or more races3.5% · 1,710
- Hispanic or Latino3.3% · 1,588
- Asian and Pacific Islander0.7% · 354
- American Indian and Alaska Native0.5% · 255
Methodology
How we calculated this
The first name Molly has a living-bearer frequency of 0.0452% of the US population, based on 154,836 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 Molly right now.
The surname Callahan appears at a rate of 16.35 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0163%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 25 people with the full name Molly Callahan. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Molly
Related
Other people with the surname Callahan
FAQ
Molly Callahan: questions and answers
How many people are named Molly Callahan?
We estimate approximately 25 people in the United States share the full name Molly Callahan. That works out to about 1 in 13,710,174 Americans. This is calculated by combining the first-name frequency (0.0452%) with the surname frequency (16.35 per 100K) against the current US population.
How rare is the name Molly Callahan?
We classify Molly Callahan as "Very Rare". About 1 in 13,710,174 Americans share this exact first and last name combination.
Is Molly a male or female name?
Molly is predominantly female. Out of 174,877 total SSA registrations, 0.2% were male and 99.8% were female. See the full Molly 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 many Americans are named Molly Callahan?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.