How Many People Are Named Thomasa?
An estimated 231 people in the United States have the first name Thomasa. It is almost exclusively a female name. The average bearer is 58 years old, and Thomasa peaked in popularity in 1961 with 20 births that year.
Below you will find a full statistical profile of Thomasa as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Thomasa paired with any surname.
Estimated Living Americans
231
About 1 in 1,483,785 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
58
years old
Peak Year
1961
20 births
Total Registered
304
since 1880
Gender Distribution for Thomasa
Thomasa is almost exclusively a female name. Out of 304 total births registered, 100.0% were female.
Thomasa as a female name
Ranked #15,414 in 1992
5 female births in 1992
Peak: 1961 (20 births)
Thomasa: Popularity Over Time
SSA records for Thomasa span from the 1920s to the 1990s, covering 8 decades of naming data. The most popular decade for this name was the 1960s, when 125 babies were registered. Thomasa has declined significantly from its peak in the 1960s. Recent registrations are a fraction of what they were at the name's height.
Thomasa by Decade
How has Thomasa tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Thomasa by State
Thomasa + Last Name Combinations
How many people share a full name with Thomasa as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Thomasa
Other first names starting with T with a similar number of bearers.
Thomasa: Questions and Answers
How many people in the U.S. are named Thomasa?
We estimate approximately 231 people named Thomasa are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 1,483,785 Americans share this first name.
Is Thomasa a common name?
Thomasa is classified as "Very Rare" and is more popular than 76.1% of all first names in the SSA database. A total of 304 births have been registered with this name since 1880.
When was Thomasa most popular?
Thomasa reached peak popularity in 1961, when 20 babies were given this name. The average age of a living person named Thomasa is approximately 58 years old, reflecting when the name was most commonly given.
Is Thomasa a female name?
Thomasa is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Thomasa Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Thomasa Smith, Thomasa Johnson, Thomasa Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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