Kolby
Girl name · #3608 in 2025 · Uniqueness 50/100
Kolby is currently the #3608 girl name in the United States — 42 babies received it in 2025. A decade ago it stood at #4144, so the name has been rising over the past ten years. Roughly one in every 42,857 girls born in 2025 was named Kolby.
Babies named Kolby per year, 1880–2025. Source: SSA.
The 47-year story
Kolby first appears in the Social Security records in 1978, when 6 girls received the name. Its peak came in 2000, when 55 girls were named Kolby — good for #2672 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.
Unlock the 5-year forecast and compare Kolby against up to 5 other names.
Uniqueness: will there be another Kolby in class?
Kolby scores 50 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Kolby is most common
State-level data for Kolby is sparse in 2025 — the name's footprint is too small for most states to report (the SSA suppresses counts under 5 per state for privacy).
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, Kaley, Katya, Kamry, and Karley.
ColbyKaleyKatyaKamryKarleyKailyKayleyKarson
Rank history (last 25 years)
| Year | Babies named Kolby | Rank |
|---|---|---|
| 2025 | 42 | #3577 |
| 2024 | 38 | #3892 |
| 2023 | 46 | #3428 |
| 2022 | 27 | #4907 |
| 2021 | 25 | #5091 |
| 2020 | 23 | #5314 |
| 2019 | 25 | #5163 |
| 2018 | 26 | #5007 |
| 2017 | 35 | #4147 |
| 2016 | 38 | #3923 |
| 2015 | 35 | #4144 |
| 2014 | 50 | #3226 |
| 2013 | 47 | #3367 |
| 2012 | 19 | #6576 |
| 2011 | 35 | #4151 |
| 2010 | 32 | #4494 |
| 2009 | 31 | #4677 |
| 2008 | 38 | #4089 |
| 2007 | 23 | #5895 |
| 2006 | 16 | #7482 |
| 2005 | 17 | #6820 |
| 2004 | 30 | #4492 |
| 2003 | 29 | #4418 |
| 2002 | 44 | #3196 |
| 2001 | 42 | #3256 |
Frequently asked questions
Is Kolby a popular girl name?
Kolby ranked #3608 among girls in 2025 with 42 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #4144.
When was the name Kolby most popular?
Kolby peaked in 2000, when 55 American girls received the name (ranked #2672 that year). Since 2000 the name has declined from that high.
How rare is the name Kolby?
In 2025, roughly 1 in 42,857 newborn American girls was named Kolby. It scores 50/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.