How Many People Are Named Thea?
An estimated 17,363 people in the United States have the first name Thea. It is almost exclusively a female name. The average bearer is 20 years old, and Thea peaked in popularity in 2018 with 1,208 births that year.
Below you will find a full statistical profile of Thea 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 Thea paired with any surname.
Estimated Living Americans
17,363
About 1 in 19,741 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
100.0% confidence
Average Age
20
years old
Peak Year
2018
1,208 births
Total Registered
19,242
since 1880
Gender Distribution for Thea
Thea is almost exclusively a female name. Out of 19,242 total births registered, 100.0% were female.
Thea as a male name
Ranked #4,891 in 1924
5 male births in 1924
Peak: 1924 (5 births)
Thea as a female name
Ranked #348 in 2024
893 female births in 2024
Peak: 2018 (1,208 births)
Thea: Popularity Over Time
SSA records for Thea span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2010s, when 6,406 babies were registered. While Thea is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Thea by Decade
How has Thea 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.
Thea by State
Birth registrations for Thea span all 51 states and territories in the SSA database. The highest counts are in California, New York, Pennsylvania. The lowest are in Delaware, Wyoming, Vermont. On average, about 279 Theas were registered per state.
Thea + Last Name Combinations
How many people share a full name with Thea as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Thea
Other first names starting with T with a similar number of bearers.
Thea: Questions and Answers
How many people in the U.S. are named Thea?
We estimate approximately 17,363 people named Thea 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 19,741 Americans share this first name.
Is Thea a common name?
Thea is classified as "Uncommon" and is more popular than 98.3% of all first names in the SSA database. A total of 19,242 births have been registered with this name since 1880.
When was Thea most popular?
Thea reached peak popularity in 2018, when 1,208 babies were given this name. The average age of a living person named Thea is approximately 20 years old, reflecting when the name was most commonly given.
Is Thea a female name?
Thea is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Thea Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Thea Smith, Thea Johnson, Thea 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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