How Many People Are Named Guillermo?
people named Guillermo are alive in the United States today (estimate)
About 1 in 12,175 people in the US has this name
Based on 32,148 babies named Guillermo in Social Security records from 1885 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
693 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Spanish form of WILLIAM.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
Almost all of the babies given the name Guillermo (99.7%) were boys.
👥 Age Distribution
The average person named Guillermo alive today is about 32 years old, and 50% are under 30. Half of them were between 19 and 44 in 2025.
📈 Popularity Over Time
Guillermo first appears in the records in 1885 and was given most often in 1998, to 693 babies. In 2025, 264 babies got the name.
Babies given the name each year, 1885 to 2025
🏆 Rank History
Guillermo has never been one of the 100 most popular boys' names. Its best rank was #352, in 1996. In 2025 it ranked #902.
| Boys | |
|---|---|
| Rank in 2025 | #902 |
| Best rank | #352 (1996) |
| Years in the top 100 | None |
| Rank in its biggest decade | #378 in the 1990s |
📍 State-Wise Distribution
People named Guillermo alive today, by the state where they were born (estimate; state records start in 1910).
More people named Guillermo were born in California than in any other state: about 10,161 of those alive today. Compared with the national rate in the same years, Guillermo was given 3.6 times as often in Texas, 3.2 times in Arizona and 3.1 times in California.
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