Boys name · California
Guillermo in California
Guillermo was the 511th most popular boys name in California in 2025, with 60 babies named Guillermo that year. Since 1919, California families have named 11,089 babies Guillermo.
Popularity over time
Guillermo in California, year by year
| Year | Babies | State rank |
|---|---|---|
| 1919 | 5 | 422nd |
| 1935 | 11 | 314th |
| 1950 | 23 | 370th |
| 1965 | 65 | 299th |
| 1980 | 178 | 183rd |
| 1995 | 282 | 180th |
| 2010 | 120 | 320th |
| 2025 | 60 | 511th |
Its rank among boys names in California fell from 422nd in 1919 to 511th in 2025.
The most babies named Guillermo in California in a single year was 321, in 1992. Its best showing was 169th among boys names in 1993.
Across the country, Guillermo reached its best rank of 86th in Arizona (1915). See Guillermo in every state →
How popular is Guillermo in California?
Guillermo was the 511th most popular boys name in California in 2025, with 60 babies named Guillermo that year. Since 1919, California families have named 11,089 babies Guillermo.
How many babies are named Guillermo in California?
In 2025, 60 babies were named Guillermo in California. The most babies named Guillermo in California in a single year was 321, in 1992.
What is the rank of Guillermo in California?
Guillermo ranked 511th among boys names in California in 2025. Its best showing was 169th among boys names in 1993.
Source: U.S. Social Security Administration, names by state of birth (public domain). Counts below 5 in a state-year are omitted by the SSA for privacy.