How Many People Are Named Alfonso?
An estimated 30,023 people in the United States have the first name Alfonso. It is almost exclusively a male name. The average bearer is 42 years old, and Alfonso peaked in popularity in 1991 with 580 births that year.
Below you will find a full statistical profile of Alfonso 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 Alfonso paired with any surname.
Key Insights
- While Alfonso is overwhelmingly male, 115 female births have been registered with this name since 1880.
Estimated Living Americans
30,023
About 1 in 11,416 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
99.7% confidence
Average Age
42
years old
Peak Year
1991
580 births
Total Registered
41,353
since 1880
Gender Distribution for Alfonso
Alfonso is almost exclusively a male name. Out of 41,353 total births registered, 99.7% were male.
Alfonso as a male name
Ranked #920 in 2024
251 male births in 2024
Peak: 1991 (574 births)
Alfonso as a female name
Ranked #11,549 in 1991
6 female births in 1991
Peak: 1972 (9 births)
Alfonso: Popularity Over Time
SSA records for Alfonso span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1990s, when 5,207 babies were registered. Alfonso has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Alfonso by Decade
How has Alfonso 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 | 43 | 43 | 0 | |
| 1890s | 108 | 108 | 0 | |
| 1900s | 338 | 338 | 0 | |
| 1910s | 1,649 | 1,649 | 0 | |
| 1920s | 3,305 | 3,294 | 11 | |
| 1930s | 2,997 | 2,986 | 11 | |
| 1940s | 2,999 | 2,987 | 12 | |
| 1950s | 3,829 | 3,818 | 11 | |
| 1960s | 3,791 | 3,775 | 16 | |
| 1970s | 4,141 | 4,115 | 26 | |
| 1980s | 4,559 | 4,537 | 22 | |
| 1990s | 5,207 | 5,201 | 6 | |
| 2000s | 4,508 | 4,508 | 0 | |
| 2010s | 2,679 | 2,679 | 0 | |
| 2020s | 1,200 | 1,200 | 0 | |
Alfonso by State
Birth registrations for Alfonso span all 39 states and territories in the SSA database. The highest counts are in California, Texas, New York. The lowest are in Kentucky, Idaho, Minnesota. On average, about 923 Alfonsos were registered per state.
Alfonso + Last Name Combinations
How many people share a full name with Alfonso as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Alfonso
Other first names starting with A with a similar number of bearers.
Alfonso: Questions and Answers
How many people in the U.S. are named Alfonso?
We estimate approximately 30,023 people named Alfonso 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 11,416 Americans share this first name.
Is Alfonso a common name?
Alfonso is classified as "Uncommon" and is more popular than 98.8% of all first names in the SSA database. A total of 41,353 births have been registered with this name since 1880.
When was Alfonso most popular?
Alfonso reached peak popularity in 1991, when 580 babies were given this name. The average age of a living person named Alfonso is approximately 42 years old, reflecting when the name was most commonly given.
Is Alfonso a male name?
Alfonso is predominantly male. 99.7% of people with this name are male. See the gender breakdown above for full details.
How many Alfonso Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Alfonso Smith, Alfonso Johnson, Alfonso 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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