Kolby
How to say it: KOHL-bee · /ˈkoʊlbi/
Phonetic variant of Colby; from Old Norse place name 'Koli's settlement', a habitational surname turned given name.
Kolby was the 479th most popular boys’ name in the United States in 2025, given to 165 babies (Social Security Administration). Its busiest decade was the 2000s, its births are down about 34% in ten years, and it is projected to rise to #473 by 2030.
Updated · SSA 2025 data, published May 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #479 |
|---|---|
| Babies born in 2025 | 165 |
| Share of births | 1 in 5,347 |
| Peak decade | 2000s |
| Change over 10 years | −34% |
| Projected rank for 2030 (estimate) | #473 |
Sources: Social Security Administration (SSA). How we compute these figures.
Its life, decade by decade
Born in the last few decades, Kolby climbed highest in the 2000s. It is well below that high point today but looks ready to climb again.
What goes with it
Sharp and punchy with a brisk finish. Brody belongs in the same group.
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Kolby is about under 1 in 200.
Around the world
This spelling is used in English.
Keep exploring
Find names you'll both love, starting with Kolby
The one-minute style quiz.