Kolby
Boy name · #1226 in 2025 · Very rare
How old is the name Kolby? In official American birth records, Kolby has been tracked continuously since 1968, giving it 57 years of documented American history.
Kolby ranks #1226 among American boys' names as of 2025, with 165 newborns given the name that year. A decade ago it stood at #828, so the name has been falling over the past ten years. Roughly one in every 10,909 boys born in 2025 was named Kolby.
The 57-year story
Kolby first appears in the Social Security records in 1968, when 5 boys received the name. Its peak came in 2001, when 739 boys were named Kolby — good for #359 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. 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 Kolby per year. Source: Official national birth records.
Unlock the 5-year forecast and compare Kolby against up to 5 other names.
Uniqueness: will there be another Kolby in class?
On our rarity read — which blends how common Kolby is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Kolby will likely be the only one in the room, with the occasional spelling-out as the price.
Where Kolby is most common
State-level data for Kolby 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 Kolby
Statistically, parents drawn to Kolby tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Colby, Koby, Coby, Keon, and Javon.
ColbyKobyCobyKeonJavonKeyonJordyJakob
Rank history (last 25 years)
| Year | Babies named Kolby | Rank |
|---|---|---|
| 2025 | 165 | #1222 |
| 2024 | 156 | #1262 |
| 2023 | 167 | #1197 |
| 2022 | 159 | #1237 |
| 2021 | 151 | #1262 |
| 2020 | 170 | #1144 |
| 2019 | 153 | #1234 |
| 2018 | 182 | #1086 |
| 2017 | 166 | #1141 |
| 2016 | 219 | #950 |
| 2015 | 272 | #828 |
| 2014 | 300 | #776 |
| 2013 | 304 | #749 |
| 2012 | 286 | #791 |
| 2011 | 325 | #705 |
| 2010 | 344 | #684 |
| 2009 | 371 | #662 |
| 2008 | 401 | #618 |
| 2007 | 378 | #642 |
| 2006 | 341 | #669 |
| 2005 | 387 | #585 |
| 2004 | 497 | #493 |
| 2003 | 543 | #464 |
| 2002 | 676 | #384 |
| 2001 | 739 | #359 |
Frequently asked questions
How old is the name Kolby?
In official American birth records, the name Kolby first appeared in 1968 (over 57 years ago), when 5 newborn boys received the name. It has been tracked in modern national records for 57 years.
Is Kolby a popular boy name?
Kolby ranked #1226 among boys in 2025 with 165 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #828.
When was the name Kolby most popular?
Kolby peaked in 2001, when 739 American boys received the name (ranked #359 that year). Since 2001 the name has declined from that high.
How rare is the name Kolby?
In 2025, roughly 1 in 10,909 newborn American boys was named Kolby. 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.