How Many People Are Named Dex?
An estimated 628 people in the United States have the first name Dex. It is almost exclusively a male name. The average bearer is 16 years old, and Dex peaked in popularity in 2016 with 43 births that year.
Below you will find a full statistical profile of Dex 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 Dex paired with any surname.
Estimated Living Americans
628
About 1 in 545,787 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
16
years old
Peak Year
2016
43 births
Total Registered
638
since 1880
Gender Distribution for Dex
Dex is almost exclusively a male name. Out of 638 total births registered, 100.0% were male.
Dex as a male name
Ranked #3,809 in 2024
29 male births in 2024
Peak: 2016 (43 births)
Dex: Popularity Over Time
SSA records for Dex span from the 1950s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2010s, when 272 babies were registered. While Dex is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Dex by Decade
How has Dex 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.
Dex by State
Birth registrations for Dex span all 3 states and territories in the SSA database. The highest counts are in California, Illinois, Texas. The lowest are in Texas, Illinois, California. On average, about 10 Dexs were registered per state.
Dex + Last Name Combinations
How many people share a full name with Dex as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Dex
Other first names starting with D with a similar number of bearers.
Dex: Questions and Answers
How many people in the U.S. are named Dex?
We estimate approximately 628 people named Dex 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 545,787 Americans share this first name.
Is Dex a common name?
Dex is classified as "Very Rare" and is more popular than 86.7% of all first names in the SSA database. A total of 638 births have been registered with this name since 1880.
When was Dex most popular?
Dex reached peak popularity in 2016, when 43 babies were given this name. The average age of a living person named Dex is approximately 16 years old, reflecting when the name was most commonly given.
Is Dex a male name?
Dex is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Dex Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Dex Smith, Dex Johnson, Dex 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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