Cosmo
Boy name · #1935 in 2025 · Very rare
How old is the name Cosmo? In official American birth records, Cosmo has been tracked continuously since 1910, giving it 115 years of documented American history.
Cosmo is currently the #1935 boy name in the United States — 80 babies received it in 2025. A decade ago it stood at #3431, so the name has been rising over the past ten years. Roughly one in every 22,500 boys born in 2025 was named Cosmo.
The 115-year story
Cosmo first appears in the Social Security records in 1910, when 6 boys received the name. Its all-time peak is essentially right now: 2022, with 99 babies and a rank of #1706. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Cosmo per year. Source: Official national birth records.
Unlock the 5-year forecast and compare Cosmo against up to 5 other names.
Uniqueness: will there be another Cosmo in class?
On our rarity read — which blends how common Cosmo is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Cosmo will likely be the only one in the room, with the occasional spelling-out as the price.
Where Cosmo is most common
State-level data for Cosmo is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Cosmo
Statistically, parents drawn to Cosmo tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Amadeo, Kaito, Draco, Miklo, and Cato.
AmadeoKaitoDracoMikloCatoRenzoIndigoKailo
Rank history (last 25 years)
| Year | Babies named Cosmo | Rank |
|---|---|---|
| 2025 | 80 | #1932 |
| 2024 | 99 | #1685 |
| 2023 | 94 | #1744 |
| 2022 | 99 | #1706 |
| 2021 | 78 | #1931 |
| 2020 | 60 | #2264 |
| 2019 | 49 | #2626 |
| 2018 | 41 | #2893 |
| 2017 | 42 | #2840 |
| 2016 | 21 | #4624 |
| 2015 | 32 | #3431 |
| 2014 | 14 | #5997 |
| 2013 | 20 | #4621 |
| 2012 | 16 | #5482 |
| 2011 | 22 | #4356 |
| 2010 | 25 | #3994 |
| 2009 | 18 | #5102 |
| 2008 | 22 | #4395 |
| 2007 | 19 | #4808 |
| 2006 | 33 | #3227 |
| 2005 | 41 | #2653 |
| 2004 | 26 | #3534 |
| 2003 | 22 | #3838 |
| 2002 | 29 | #3095 |
| 2001 | 22 | #3721 |
Frequently asked questions
How old is the name Cosmo?
In official American birth records, the name Cosmo first appeared in 1910 (over 115 years ago), when 6 newborn boys received the name. It has been tracked in modern national records for 115 years.
Is Cosmo a popular boy name?
Cosmo ranked #1935 among boys in 2025 with 80 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #3431.
When was the name Cosmo most popular?
Cosmo peaked in 2022, when 99 American boys received the name (ranked #1706 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Cosmo?
In 2025, roughly 1 in 22,500 newborn American boys was named Cosmo. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.