Total births
1,016
Boys' name · since 1911
Cosimo
1,016 babies named Cosimo in U.S. Social Security records since 1911, with the highest year being 1927. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #5083
- among boys today
- 1,016
- born since 1911
- 1920s
- peak decade
- 64%
- more common than other boys
1,016 babies have been named Cosimo since 1911, making it today's #5083 boys' name.
Cosimo has 1,016 recorded births among boys since 1911, per the U.S. Social Security Administration, ranked #5083 as of the latest data, more common than 64% of boys, busiest in the 1920s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1911 to 2025.
- #5083 among boys today
- 1,016 born since 1911
- 1920s peak decade
- 64% more common than other boys
Data updated Jun 2026
The verdict
Cosimo is currently the #5083 boys' name in America, more common than 64% of boys - 1,016 born since 1911, peaking in the 1920s.
- #5083
- among boys today
- 1,016
- born since 1911
- 1920s
- peak decade
- 64%
- more common than other boys
Cosimo vs. every other boys name in current SSA rankings
#5083
of 14,294 boys in use
More common than 64% of names given to boys today.
1920s
Peak decade
21% of everyone ever named Cosimo was born in this single decade.
1927
Single peak year
30 babies were named Cosimo in 1927 - its busiest year on record.
How Cosimo compares
1,016 Top 30% higher than 70% 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
Cosimo's all-time total is 177% above the median boys name, and Liam still leads by a wide margin.
| Metric | Cosimo | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 1,016 | 367 | 358,536 |
| Peak-year births | 30 | 23 | 22,252 |
Cosimo's usage pattern, beyond the headline number
Divide Cosimo's SSA record in two at 1962 and the more recent half accounts for 42% of all births, the earlier half the remaining 58%, a genuinely balanced usage pattern. Its calmest year was 1911, with only 5 births recorded -- set against the 1927 peak of 30, that's the full swing in one name's fortunes.
Cosimo at a glance
Outside the top 1,000Peak year
1927
Current rank
#5,083
Active since
1911
Cosimo popularity over time
Annual U.S. births registered with the Social Security Administration · 1911–2025
- Peak year (1927)
- 30
- Annual births at peak, across 115 years of records
Cosimo by decade
Total births in each ten-year window, peak vs trough at a glance
1920s was Cosimo's strongest decade.
218 babies received the name during that ten-year window, about 21% of all-time use.
Cosimo births by decade
Total births in each ten-year window
- 1910s
1910s
123 births
- 1920s
1920s
218 births
- 1930s
1930s
91 births
- 1940s
1940s
92 births
- 1950s 70
1950s
70 births
- 1960s 62
1960s
62 births
- 1970s 40
1970s
40 births
- 1980s 50
1980s
50 births
- 1990s 37
1990s
37 births
- 2000s 68
2000s
68 births
- 2010s 80
2010s
80 births
- 2020s 85
2020s
85 births
What this shows Peak: 1920s at 218 births (21% of all-time use).
How Cosimo 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 Cosimo's total volume
Cosimo vs 15 similarly-sized boys names
Cosimo by state
Where Cosimo concentrates geographically, total births since 1911
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | New York | | 191 | 18.8% |
| #2 | Pennsylvania | | 30 | 3.0% |
| #3 | New Jersey | | 20 | 2.0% |
| #4 | California | | 17 | 1.7% |
New York share of Cosimo's total US births 18.8%
Even split
191 of 1,016 births nationwide. Compared to a flat distribution across 4 reporting states.
Frequently Asked Questions
How popular is the name Cosimo? ▼
Cosimo has been given to 1,016 babies in the U.S. since 1911, according to SSA data. Among boys, it ranks #5083 as of the latest data. 30 babies were born in 1927, its single highest year.
When was Cosimo most popular? ▼
Cosimo was most popular in the 1920s decade with 218 total births. The single peak year was 1927.
Where is Cosimo most popular? ▼
The top states for the name Cosimo are New York (191 births), Pennsylvania (30 births), New Jersey (20 births).
How long has the name Cosimo been used? ▼
Cosimo has been recorded in Social Security data since 1911, spanning 115 years of data through 2025.
What names are similar to Cosimo? ▼
Names with a similar sound or spelling include Cosmo, Cosme, Costa, Costas, and 4 more. These share a common prefix and are also used for boys.
What to do with Cosimo's data
- Cosimo's usage has stayed within range of its 1920s decade-level peak (218 total births) through the 2020s (85) -- a comparatively stable name, not a fading trend.
- New York records the most Cosimos (191 births) -- see the full state breakdown if geography matters to your decision. New York 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 Cosimo
Nearby Names Like Cosimo
Names with a similar sound, spelling, or feel to Cosimo
Cosmo Boy
#1693 2,949 births
Cosme Boy
#9036 1,373 births
Costa Boy
#5474 337 births
Costas Boy
#11043 285 births
Cosby Boy
212 births
Compare Cosimo side by side: Cosimo vs Cosmo Cosimo vs Cosme Cosimo vs Costa
Related Names
Names with a similar popularity rank to Cosimo
Zenon #5082
1,276 births · Peak 1954
Andrea #5084
6,029 births · Peak 1976
Aldon #5081
1,618 births · Peak 1929
Pearce #5085
1,247 births · Peak 2010
Anselmo #5080
2,748 births · Peak 1990
Berl #5086
1,089 births · Peak 1922
Arlis #5079
1,972 births · Peak 1931
Augustino #5087
485 births · Peak 2024
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, 1911–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Cosimo: #5083 Boys' Name - 1,016 Births, Peak 1927." NameAlmanac. Accessed via https://namealmanac.com/name/cosimo. 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 Cosimo 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.