How Many People Are Named Alonso?
An estimated 11,460 people in the United States have the first name Alonso. It is almost exclusively a male name. The average bearer is 22 years old, and Alonso peaked in popularity in 2010 with 380 births that year.
Below you will find a full statistical profile of Alonso 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 Alonso paired with any surname.
Estimated Living Americans
11,460
About 1 in 29,909 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
100.0% confidence
Average Age
22
years old
Peak Year
2010
380 births
Total Registered
11,905
since 1880
Gender Distribution for Alonso
Alonso is almost exclusively a male name. Out of 11,905 total births registered, 100.0% were male.
Alonso as a male name
Ranked #769 in 2024
327 male births in 2024
Peak: 2010 (380 births)
Alonso: Popularity Over Time
SSA records for Alonso span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 2010s, when 3,311 babies were registered. While Alonso is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Alonso by Decade
How has Alonso 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.
Alonso by State
Birth registrations for Alonso span all 32 states and territories in the SSA database. The highest counts are in California, Texas, Arizona. The lowest are in Minnesota, Louisiana, Idaho. On average, about 303 Alonsos were registered per state.
Alonso + Last Name Combinations
How many people share a full name with Alonso as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Alonso
Other first names starting with A with a similar number of bearers.
Alonso: Questions and Answers
How many people in the U.S. are named Alonso?
We estimate approximately 11,460 people named Alonso 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 29,909 Americans share this first name.
Is Alonso a common name?
Alonso is classified as "Uncommon" and is more popular than 97.9% of all first names in the SSA database. A total of 11,905 births have been registered with this name since 1880.
When was Alonso most popular?
Alonso reached peak popularity in 2010, when 380 babies were given this name. The average age of a living person named Alonso is approximately 22 years old, reflecting when the name was most commonly given.
Is Alonso a male name?
Alonso is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Alonso Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Alonso Smith, Alonso Johnson, Alonso 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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