Alonso Boy
How popular is Alonso?
#785 boy name in 2025
324 baby boys were named Alonso in the US in 2025, making it the 785th most popular boy name.
Alonso popularity over time
| Rank in 2025 | #785 for boys (▼ 16 from 2024) |
|---|---|
| Babies in 2025 | 324 boys |
| 10-year trend | Steady (-3% babies vs 2015) |
| Earlier ranks | #733 in 2015, #783 in 2020 |
| Peak year | 2010 (380 boys) |
| Highest rank | #622 in 2002 |
| First recorded | 1915 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.2% in a class of 25 kids born in 2025 |
Alonso counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Alonzo family of names ranked #362 for boys in 2025 (#360 the year before), with 914 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Alonzo | 590 | 65% |
| Alonso | 324 | 35% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Alonso is most popular
Babies named Alonso per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- Arizona: 0.5 per 1,000 (76 boys)
- Texas: 0.4 per 1,000 (379 boys)
- California: 0.4 per 1,000 (372 boys)
- Colorado: 0.3 per 1,000 (40 boys)
- Nevada: 0.3 per 1,000 (17 boys)
Alonso by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1910s | 31 | #3,176 |
| 1920s | 66 | #2,451 |
| 1930s | 72 | #2,332 |
| 1940s | 74 | #1,849 |
| 1950s | 146 | #1,546 |
| 1960s | 236 | #1,363 |
| 1970s | 457 | #1,134 |
| 1980s | 836 | #864 |
| 1990s | 1,883 | #709 |
| 2000s | 3,225 | #622 |
| 2010s | 3,311 | #636 |
| 2020s | 1,894 | #752 |
Boy names about as popular as Alonso
Questions
- Is Alonso a boy or girl name?
- Alonso is mostly a boy name. Over the last 10 years, 100% of babies named Alonso were boys.
- How popular is the name Alonso?
- 324 baby boys were named Alonso in the US in 2025, making it the 785th most popular boy name.
- When was Alonso most popular?
- Alonso peaked in 2010, when 380 boys were given the name. Its highest rank was #622 in 2002.
- How many people are named Alonso?
- 12,231 babies have been named Alonso in the US since 1880. We estimate about 11,736 of them are alive in 2026, with a median age of 18.
- Where is Alonso most popular?
- From 2021 to 2025, Alonso was most common in Arizona, at 0.5 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.