78,659births recorded
10Countries
3Variants
2001Peak · Alberta
#199Northern Ireland 2025
Colby is a boy name family recorded 78,659 times in 10 countries since 1888. It ranks highest today in Northern Ireland (#199 in 2025). Its all-time peak was in Alberta in 2001, at 419.9 births per 100,000.
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
Which form wins where
Births per 100,000 newborns for each form, in the selected country.
All forms of Colby
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Colby | English | 58,155 | 🇺🇸 United States | #615 | 2001 | ▼ 19 % |
| Colby | English | 2,567 | 🏴 England & Wales | #224 | 2025 | ▲ 232 % |
| Colby | English | 1,306 | 🇨🇦 Ontario | #478 | 2001 | ▼ 28 % |
| Colby | English | 1,264 | 🇨🇦 Alberta | #608 | 2001 | ▼ 44 % |
| Colby | English | 853 | 🇨🇦 British Columbia | #493 | 2002 | ▼ 53 % |
| Colby | English | 236 | 🏴 Scotland | #278 | 2024 | ▲ 89 % |
| Kolby | English | 13,001 | 🇺🇸 United States | #1222 | 2001 | ▼ 25 % |
| Kolby | English | 240 | 🏴 England & Wales | #1359 | 2023 | ▲ 75 % |
| Kolby | English | 234 | 🇨🇦 Alberta | – | 2002 | – |
| Kolby | English | 212 | 🇨🇦 Ontario | #1517 | 2001 | ▼ 61 % |
| Kolby | English | 125 | 🇨🇦 British Columbia | – | 2001 | – |
| Kolby | English | 17 | 🏴 Scotland | – | 2014 | – |
| Kolbi | English | 318 | 🇺🇸 United States | – | 2001 | – |
How we grouped these names
- Colby ↔ Kolby — spelling variant
- Colby ↔ Kolbi — spelling variant
Questions about Colby
How popular is the name Colby?
In 2025 it ranked #199 in Northern Ireland. Official registers record 78,659 births across 10 countries.
What is Colby in other languages?
Kolby (English); Kolbi (English).
When was Colby most popular?
It peaked in Alberta in 2001, at 419.9 births per 100,000.
Is Colby a boy or a girl name?
In official birth registers, Colby is a boy name.