How Many People Are Named Thaddeus?
An estimated 18,360 people in the United States have the first name Thaddeus. It is almost exclusively a male name. The average bearer is 39 years old, and Thaddeus peaked in popularity in 2016 with 416 births that year.
Below you will find a full statistical profile of Thaddeus 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 Thaddeus paired with any surname.
Estimated Living Americans
18,360
About 1 in 18,669 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
99.9% confidence
Average Age
39
years old
Peak Year
2016
416 births
Total Registered
25,771
since 1880
Gender Distribution for Thaddeus
Thaddeus is almost exclusively a male name. Out of 25,771 total births registered, 99.9% were male.
Thaddeus as a male name
Ranked #850 in 2024
284 male births in 2024
Peak: 2016 (416 births)
Thaddeus as a female name
Ranked #12,351 in 1985
5 female births in 1985
Peak: 1932 (6 births)
Thaddeus: Popularity Over Time
SSA records for Thaddeus span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2010s, when 3,090 babies were registered. While Thaddeus is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Thaddeus by Decade
How has Thaddeus 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.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1880s | 111 | 111 | 0 | |
| 1890s | 93 | 93 | 0 | |
| 1900s | 155 | 155 | 0 | |
| 1910s | 1,793 | 1,793 | 0 | |
| 1920s | 2,421 | 2,421 | 0 | |
| 1930s | 1,220 | 1,214 | 6 | |
| 1940s | 1,427 | 1,427 | 0 | |
| 1950s | 2,192 | 2,192 | 0 | |
| 1960s | 2,101 | 2,101 | 0 | |
| 1970s | 2,905 | 2,889 | 16 | |
| 1980s | 2,409 | 2,399 | 10 | |
| 1990s | 2,361 | 2,361 | 0 | |
| 2000s | 2,050 | 2,050 | 0 | |
| 2010s | 3,090 | 3,090 | 0 | |
| 2020s | 1,443 | 1,443 | 0 | |
Thaddeus by State
Birth registrations for Thaddeus span all 45 states and territories in the SSA database. The highest counts are in New York, Illinois, Pennsylvania. The lowest are in Rhode Island, Nevada, Hawaii. On average, about 449 Thaddeuss were registered per state.
Thaddeus + Last Name Combinations
How many people share a full name with Thaddeus as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Thaddeus
Other first names starting with T with a similar number of bearers.
Thaddeus: Questions and Answers
How many people in the U.S. are named Thaddeus?
We estimate approximately 18,360 people named Thaddeus 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 18,669 Americans share this first name.
Is Thaddeus a common name?
Thaddeus is classified as "Uncommon" and is more popular than 98.4% of all first names in the SSA database. A total of 25,771 births have been registered with this name since 1880.
When was Thaddeus most popular?
Thaddeus reached peak popularity in 2016, when 416 babies were given this name. The average age of a living person named Thaddeus is approximately 39 years old, reflecting when the name was most commonly given.
Is Thaddeus a male name?
Thaddeus is predominantly male. 99.9% of people with this name are male. See the gender breakdown above for full details.
How many Thaddeus Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Thaddeus Smith, Thaddeus Johnson, Thaddeus 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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