Alonzo Boy
How popular is Alonzo?
#511 boy name in 2025
590 baby boys were named Alonzo in the US in 2025, making it the 511th most popular boy name.
Alonzo popularity over time
Boys Girls
| Rank in 2025 | #511 for boys (▲ 1 from 2024) |
|---|---|
| Babies in 2025 | 590 boys |
| 10-year trend | Steady (+9% babies vs 2015) |
| Earlier ranks | #527 in 2015, #477 in 2020 |
| Peak year | 2022 (651 boys) |
| Highest rank | #110 in 1880 (2 years at that rank) |
| First recorded | 1880 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.4% in a class of 25 kids born in 2025 |
Alonzo 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 Alonzo is most popular
Babies named Alonzo per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- Nevada: 0.8 per 1,000 (47 boys)
- California: 0.8 per 1,000 (715 boys)
- Arizona: 0.8 per 1,000 (123 boys)
- Illinois: 0.6 per 1,000 (160 boys)
- Texas: 0.5 per 1,000 (475 boys)
Alonzo by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1880s | 1,088 | #110 |
| 1890s | 879 | #150 |
| 1900s | 808 | #182 |
| 1910s | 2,218 | #223 |
| 1920s | 2,986 | #310 |
| 1930s | 2,434 | #333 |
| 1940s | 2,647 | #357 |
| 1950s | 3,966 | #347 |
| 1960s | 4,395 | #336 |
| 1970s | 3,490 | #394 |
| 1980s | 3,619 | #421 |
| 1990s | 4,262 | #465 |
| 2000s | 4,329 | #516 |
| 2010s | 5,251 | #469 |
| 2020s | 3,583 | #471 |
Boy names about as popular as Alonzo
Questions
- Is Alonzo a boy or girl name?
- Alonzo is mostly a boy name. Over the last 10 years, 100% of babies named Alonzo were boys.
- How popular is the name Alonzo?
- 590 baby boys were named Alonzo in the US in 2025, making it the 511th most popular boy name.
- When was Alonzo most popular?
- Alonzo peaked in 2022, when 651 boys were given the name. Its highest rank was #110, held for 2 years starting in 1880.
- How many people are named Alonzo?
- 46,109 babies have been named Alonzo in the US since 1880. We estimate about 32,011 of them are alive in 2026, with a median age of 34.
- Where is Alonzo most popular?
- From 2021 to 2025, Alonzo was most common in Nevada, at 0.8 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.