How Many People Are Named Alfonzo?
An estimated 4,178 people in the United States have the first name Alfonzo. It is almost exclusively a male name. The average bearer is 47 years old, and Alfonzo peaked in popularity in 1970 with 90 births that year.
Below you will find a full statistical profile of Alfonzo 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 Alfonzo paired with any surname.
Estimated Living Americans
4,178
About 1 in 82,038 people in the U.S.
Rarity
Rare
Predicted Gender
Male
100.0% confidence
Average Age
47
years old
Peak Year
1970
90 births
Total Registered
5,755
since 1880
Gender Distribution for Alfonzo
Alfonzo is almost exclusively a male name. Out of 5,755 total births registered, 100.0% were male.
Alfonzo as a male name
Ranked #4,417 in 2024
23 male births in 2024
Peak: 1970 (90 births)
Alfonzo: Popularity Over Time
SSA records for Alfonzo span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1970s, when 802 babies were registered. Alfonzo has declined significantly from its peak in the 1970s. Recent registrations are a fraction of what they were at the name's height.
Alfonzo by Decade
How has Alfonzo 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.
Alfonzo by State
Birth registrations for Alfonzo span all 21 states and territories in the SSA database. The highest counts are in California, Texas, Illinois. The lowest are in Maryland, Indiana, District of Columbia. On average, about 99 Alfonzos were registered per state.
Alfonzo + Last Name Combinations
How many people share a full name with Alfonzo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Alfonzo
Other first names starting with A with a similar number of bearers.
Alfonzo: Questions and Answers
How many people in the U.S. are named Alfonzo?
We estimate approximately 4,178 people named Alfonzo 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 82,038 Americans share this first name.
Is Alfonzo a common name?
Alfonzo is classified as "Rare" and is more popular than 96.1% of all first names in the SSA database. A total of 5,755 births have been registered with this name since 1880.
When was Alfonzo most popular?
Alfonzo reached peak popularity in 1970, when 90 babies were given this name. The average age of a living person named Alfonzo is approximately 47 years old, reflecting when the name was most commonly given.
Is Alfonzo a male name?
Alfonzo is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Alfonzo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Alfonzo Smith, Alfonzo Johnson, Alfonzo 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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