Boy name
Alonzo
As of 2025, Alonzo ranks #511 among American boys' names, according to Social Security records. 590 boys received the name that year. The ranking has held remarkably steady over the last five years. SSA records for Alonzo go back to 1880; the peak came in 1880 at #110, with 122 babies named that year. Geographically, it's strongest in California, where it ranks #252 among boy names.
Rankings
2025 rank
#511
among boy names
Trend
Stable
last 5 years
All-time peak
#110
in 1880 (1880s)
Babies in 2025
590
boys named Alonzo
Alonzo popularity, 1880–2025
Where Alonzo is most popular
Share of boys born in 2025:lowhighno data (< 5 births)
Strongest states: Nevada (#267), California (#252), Kansas (#386)
Uniqueness score
41/ 100Balanced
everywhereone of a kind
Well known, but far from crowded — the middle of the field. Based on how many babies per birth were named Alonzo in the most recent year of SSA data.