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 ancestry information.
Expected bearers
1
1 in 342,754,338
Named Thora
763
Alive today
Named Birch
14K
Alive today
US population
343M
Denominator
Estimated living: 763
Rarity: Very Rare
Gender: Female
Peak year: 1916
Average age: 31
Estimated bearers: 14K
Rarity: Uncommon
Census rank: #2,954
Per 100K: 4.12
Top ancestry: White (82.8%)
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
Ethnicity
Ancestry of the Birch surname
Self-reported race and ethnicity breakdown for people with the surname Birch, from the 2010 US Census Bureau. The largest group is White at 82.8%.
- White82.8%
- Black or African American10.9%
- Hispanic or Latino3.1%
- Two or more races1.9%
- Asian and Pacific Islander0.8%
- American Indian and Alaska Native0.5%
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).
The surname Birch appears at a rate of 4.12 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0041%.
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.
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 (4.12 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 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.