Colby is a distinctive boys' name in England & Wales, ranking #631 in 2016 with 56 recorded births. This places Colby in the top 10% of ranked UK boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2025 with 222 births ranking #224. Since 1996, the popularity has increased by 229.4%. In 2016, approximately 1 in every 5,927 boys born was named Colby. STABLE Recent data shows the name is currently stable.
Colby is an English surname-style name with a light, approachable sound. The older place-name meaning is less central to modern use than the name's friendly, sporty feel.
Like many names of its type, Colby entered first-name use through surname tradition and later settled into mainstream naming. It has a very late twentieth-century American profile.