Thora Birch
There are approximately 1 people named Thora Birch living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Thora with Census Bureau frequency data for the surname Birch. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
1
1 in 342,754,338
Named Thora
763
Alive today
Named Birch
13K
Alive today
US population
343M
Denominator
Estimated living: 763
Rarity: Very Rare
Gender: Female
Peak year: 1916
Average age: 31
Top Census group: White (77.2%)
Estimated bearers: 13K
Rarity: Uncommon
Census rank: #3,035
Per 100K: 3.87
Top ancestry: White (79.7%)
First name trend
Thora: popularity over time
Year-by-year SSA birth registrations for the first name Thora. The peak year was 1916 with 72 births. The average person named Thora today is 31 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Thora
Self-reported race and ethnicity breakdown for people with the first name Thora, from the 2020 US Census Bureau first-name tables. The largest published group is White at 77.2%.
The bar chart below shows how people with the first name Thora 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 Thora at the time of the Census. A first name does not determine a person's race or ethnicity.
- White77.2% · 712
- Black or African American12.9% · 119
- Two or more races4.2% · 39
- Hispanic or Latino3.8% · 35
- Asian and Pacific Islander1.3% · 12
- American Indian and Alaska Native0.5% · 5
Ethnicity
Ancestry of the Birch surname
Self-reported race and ethnicity breakdown for people with the surname Birch, from the 2020 US Census Bureau. The largest group is White at 79.7%.
The bar chart below shows how people with the surname Birch 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 Birch at the time of the Census. A surname does not determine a person's race or ethnicity.
- White79.7% · 9,208
- Black or African American11.2% · 1,292
- Two or more races4.0% · 460
- Hispanic or Latino3.8% · 434
- Asian and Pacific Islander0.9% · 107
- American Indian and Alaska Native0.5% · 54
Methodology
How we calculated this
The first name Thora has a living-bearer frequency of 0.0002% of the US population, based on 763 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 Thora right now.
The surname Birch appears at a rate of 3.87 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0039%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Thora Birch. 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 Birch
FAQ
Thora Birch: questions and answers
How many people are named Thora Birch?
We estimate approximately 1 people in the United States share the full name Thora Birch. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0002%) with the surname frequency (3.87 per 100K) against the current US population.
How rare is the name Thora Birch?
We classify Thora Birch as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Thora a male or female name?
Thora is predominantly female. Out of 2,404 total SSA registrations, 0.0% were male and 100.0% were female. See the full Thora 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 people are named Thora Birch?
Find out how common the name Thora Birch is on our sister site HowManyOfMe.org — a quick modern estimate with the living-bearer count front and centre.