Home / Name Directory / Guillermo
How Many People Are Named Guillermo?
Estimated people named Guillermo living in the U.S. today
28,125
Gender distribution
100% male · 0% female in SSA records.
Name scorecard
- Total U.S. births recorded (1880–2024): 31,881
- Peak year: 1998 (693 births)
- Estimated living today: 28,125
Guillermo by age group — who carries the name today?
Guillermo popularity over time (1880–2024)
Estimated living bearers by birth decade
About the name Guillermo
Guillermo has been recorded by the Social Security Administration since the 19th century dataset began. In total, 31,881 babies were given the name in the United States between 1880 and 2024. After adjusting each birth cohort for survival to today, an estimated 28,125 bearers are still living — roughly 1 in 12,153 Americans. The name's strongest decade shapes how old most Guillermos you meet will be, which the age-group breakdown above shows directly. All figures are statistical estimates from public records; see our methodology for sources, the survival model, and the limits of the data (names given to fewer than five babies in a year are not published by the SSA).
Frequently asked questions
How many people are named Guillermo in the US?
An estimated 28,125 people named Guillermo are living in the United States today, based on SSA birth records from 1880 to 2024 adjusted for survival. That makes Guillermo rare — about 1 in 12,153 Americans.
Is Guillermo a boy or girl name?
In SSA records, Guillermo is 100% male and 0% female, so it is predominantly a male name.
When was Guillermo most popular?
Guillermo peaked in 1998, when 693 babies were given the name. Its current trend is declining compared with the previous decade.
How rare is the name Guillermo?
Guillermo ranks #1,305 of 104,819 first names recorded by the SSA, with a rarity score of 48 out of 100 (higher means rarer).