How Many People Are Named Theodor?
An estimated 1,657 people in the United States have the first name Theodor. It is almost exclusively a male name. The average bearer is 26 years old, and Theodor peaked in popularity in 2022 with 88 births that year.
Below you will find a full statistical profile of Theodor 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 Theodor paired with any surname.
Estimated Living Americans
1,657
About 1 in 206,852 people in the U.S.
Rarity
Rare
Predicted Gender
Male
100.0% confidence
Average Age
26
years old
Peak Year
2022
88 births
Total Registered
2,140
since 1880
Gender Distribution for Theodor
Theodor is almost exclusively a male name. Out of 2,140 total births registered, 100.0% were male.
Theodor as a male name
Ranked #2,109 in 2024
71 male births in 2024
Peak: 2022 (88 births)
Theodor: Popularity Over Time
SSA records for Theodor span from the 1880s to the 2020s, covering 14 decades of naming data. The most popular decade for this name was the 2010s, when 492 babies were registered. Theodor remains highly popular today, with recent registration numbers near its historical peak.
Theodor by Decade
How has Theodor 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.
Theodor by State
Birth registrations for Theodor span all 12 states and territories in the SSA database. The highest counts are in California, New York, Texas. The lowest are in New Jersey, Massachusetts, Georgia. On average, about 27 Theodors were registered per state.
Theodor + Last Name Combinations
How many people share a full name with Theodor as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Theodor
Other first names starting with T with a similar number of bearers.
Theodor: Questions and Answers
How many people in the U.S. are named Theodor?
We estimate approximately 1,657 people named Theodor 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 206,852 Americans share this first name.
Is Theodor a common name?
Theodor is classified as "Rare" and is more popular than 92.9% of all first names in the SSA database. A total of 2,140 births have been registered with this name since 1880.
When was Theodor most popular?
Theodor reached peak popularity in 2022, when 88 babies were given this name. The average age of a living person named Theodor is approximately 26 years old, reflecting when the name was most commonly given.
Is Theodor a male name?
Theodor is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Theodor Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Theodor Smith, Theodor Johnson, Theodor 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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