Total births
32,074
Boys' name · since 1885
Guillermo
32,074 babies named Guillermo in U.S. Social Security records since 1885, with the highest year being 1998. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #831
- among boys today
- 32,074
- born since 1885
- 1990s
- peak decade
- 94%
- more common than other boys
Guillermo currently ranks #831 among boys' names in America, with 32,074 babies recorded since 1885.
Social Security Administration records show Guillermo recorded 32,074 times among boys since 1885, holding rank #831 nationally today, ahead of 94% of boys, peaking in the 1990s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1885 to 2025.
- #831 among boys today
- 32,074 born since 1885
- 1990s peak decade
- 94% more common than other boys
Data updated Jun 2026
The verdict
Guillermo is currently the #831 boys' name in America, more common than 94% of boys - 32,074 born since 1885, peaking in the 1990s.
- #831
- among boys today
- 32,074
- born since 1885
- 1990s
- peak decade
- 94%
- more common than other boys
Guillermo vs. every other boys name in current SSA rankings
#831
of 14,294 boys in use
More common than 94% of names given to boys today.
1990s
Peak decade
20% of everyone ever named Guillermo was born in this single decade.
1998
Single peak year
693 babies were named Guillermo in 1998 - its busiest year on record.
How Guillermo compares
32,074 Top 5% higher than 95% of 14,294 names currently given to boys
Based on all-time total births among currently-ranked boys names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Guillermo's all-time total is 87x the median boys name, and Liam still leads by a wide margin.
| Metric | Guillermo | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 32,074 | 367 | 358,536 |
| Peak-year births | 693 | 23 | 22,252 |
Guillermo's usage pattern, beyond the headline number
Divide Guillermo's SSA record in two at 1963 and the more recent half accounts for 85% of all births, the earlier half the remaining 15%, consistent with a name still gaining ground rather than fading. Its calmest year was 1885, with only 5 births recorded -- set against the 1998 peak of 693, that's the full swing in one name's fortunes.
Guillermo at a glance
Top 1,000 boys' namePeak year
1998
Current rank
#831
Active since
1885
Guillermo popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 1885–2025
- Peak year (1998)
- 693
- Annual births at peak, across 141 years of records
Guillermo popularity over time - girls
74 total births recorded since 1966 (Guillermo as girls' name)
Guillermo by decade
Total births in each ten-year window, peak vs trough at a glance
1990s was Guillermo's strongest decade.
6,462 babies received the name during that ten-year window, about 20% of all-time use.
Guillermo births by decade
Total births in each ten-year window
- 1880s 5
1880s
5 births
- 1890s 13
1890s
13 births
- 1900s 44
1900s
44 births
- 1910s 253
1910s
253 births
- 1920s 821
1920s
821 births
- 1930s 783
1930s
783 births
- 1940s 943
1940s
943 births
- 1950s 1,495
1950s
1,495 births
- 1960s 2,107
1960s
2,107 births
- 1970s
1970s
3,357 births
- 1980s
1980s
4,363 births
- 1990s
1990s
6,462 births
- 2000s
2000s
6,095 births
- 2010s
2010s
3,615 births
- 2020s 1,718
2020s
1,718 births
What this shows Peak: 1990s at 6,462 births (20% of all-time use).
How Guillermo compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 boys names closest to Guillermo's total volume
Guillermo vs 15 similarly-sized boys names
Guillermo by state
Where Guillermo concentrates geographically, total births since 1885
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 11,089 | 34.6% |
| #2 | Texas | | 8,913 | 27.8% |
| #3 | Arizona | | 1,516 | 4.7% |
| #4 | New York | | 1,503 | 4.7% |
| #5 | Florida | | 1,422 | 4.4% |
| #6 | Illinois | | 1,334 | 4.2% |
| #7 | New Jersey | | 476 | 1.5% |
| #8 | New Mexico | | 448 | 1.4% |
California share of Guillermo's total US births 34.6%
Even split
11,089 of 32,074 births nationwide. Compared to a flat distribution across 35 reporting states.
Guillermo appears in 35 states. Explore state details →
Frequently Asked Questions
How popular is the name Guillermo? ▼
32,074 babies have been named Guillermo since 1885. It currently ranks #831 among boys. The peak year was 1998 with 693 births.
When was Guillermo most popular? ▼
Guillermo was most popular in the 1990s decade with 6,462 total births. The single peak year was 1998.
Where is Guillermo most popular? ▼
The top states for the name Guillermo are California (11,089 births), Texas (8,913 births), Arizona (1,516 births).
How long has the name Guillermo been used? ▼
Records for Guillermo go back to 1885, giving 141 years of history through 2025.
What names are similar to Guillermo? ▼
Names with a similar sound or spelling include Guido, Guilford, Guiseppe, Guilherme, and 4 more. These share a common prefix and are also used for boys.
What to do with Guillermo's data
- Guillermo's decade-level peak was the 1990s (6,462 total births); usage has since declined to 1,718 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- California records the most Guillermos (11,089 births) -- see the full state breakdown if geography matters to your decision. California names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Guillermo
Nearby Names Like Guillermo
Names with a similar sound, spelling, or feel to Guillermo
Guido Boy
#10993 3,352 births
Guilford Boy
589 births
Guiseppe Boy
575 births
Guilherme Boy
#12526 522 births
Guillaume Boy
#11162 342 births
Compare Guillermo side by side: Guillermo vs Guido Guillermo vs Guilford Guillermo vs Guiseppe
Related Names
Names with a similar popularity rank to Guillermo
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1885–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Guillermo: #831 Boys' Name - 32,074 Births, Peak 1998." NameAlmanac. Accessed via https://namealmanac.com/name/guillermo. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Guillermo draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.