| Gender | Unisex (originally only male) |
|---|---|
| Language | Old Norse, Old English |
| Origin | |
| Meaning | Koli's town, Cola's town, coal town |
| Other names | |
| Alternative spelling | Colbie |
| Related names | Cole, Colton, Coley |
Colby is a gender-neutral given name, meaning "Koli's town", "Cola's town", or "coal town".