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.
- #658 of 45,481
- all-time among boys
- #902 of 13,930
- 2025 SSA year
- 32,074
- born since 1885
- 1990s
- peak decade
Guillermo currently ranks #902 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 #902 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.
- #658 of 45,481 all-time among boys
- #902 of 13,930 2025 SSA year
- 32,074 born since 1885
- 1990s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Guillermo ranks #658 of 45,481 boys' names by all-time recorded births (highest first) and #902 of 13,930 among boys' names in 2025. 32,074 born since 1885, peaking in the 1990s.
- #658 of 45,481
- all-time among boys
- #902 of 13,930
- 2025 SSA year
- 32,074
- born since 1885
- 1990s
- peak decade
Guillermo's 32,074 recorded births place it above 98.55% of the 45,481 boys names in the full SSA archive.
35 jurisdictions carry state-level records, led by California.
How Guillermo compares
32,074 Top 5% higher than 95% of 13,930 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 (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 32,074 | 369 | 358,536 |
| Peak-year births | 693 | 34 | 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 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
1990s is the heaviest window (6,462 births, 20% of the file).
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 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% |
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? ▼
Where does Guillermo sit in the SSA name archive? ▼
When was Guillermo most popular? ▼
Where is Guillermo most popular? ▼
How long has the name Guillermo been used? ▼
What names are similar to Guillermo? ▼
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
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
Compare Guillermo side by side: Guillermo vs Guido Guillermo vs Guilford Guillermo vs Guiseppe
Related Names
Names with a similar popularity rank to Guillermo
Nationwide names with similar peak year or record span
Two nationwide peer axes for Guillermo: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1998)
Similar record span (~140 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 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).
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 August 2026.