How Many People Are Named Colby?
people named Colby are alive in the United States today (estimate)
About 1 in 6,085 people in the US has this name
Based on 58,155 babies named Colby in Social Security records from 1888 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
3,979 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
From a surname, originally from various English place names, derived from the Old Norse nickname Koli (meaning "coal, dark") and býr "town".
Source of the meaning, origin, pronunciation and related names: Behind the Name.
Same Sound, Other Spellings
These names are pronounced like Colby in English. Counting Colby and these spellings together, about 68,917 people alive in the US have the name.
Related & Similar Names
⚧ Gender Distribution
Of the babies given the name Colby, 7.3% were girls and 92.7% were boys. The share of girls among babies named Colby rose from 0% in the 1940s to 10.5% in the 2020s. It was highest in the 1950s, at 22.4%.
👥 Age Distribution
The average person named Colby alive today is about 26 years old, and 65% are under 30. Half of them were between 18 and 33 in 2025.
📈 Popularity Over Time
Colby first appears in the records in 1888 and was given most often in 2001, to 3,979 babies. In 2025, 515 babies got the name.
Babies given the name each year, 1888 to 2025
🏆 Rank History
Colby never made the top 10 boys' names. Its best rank was #99, in 2001, and it was in the top 100 in 2001. In 2025 it ranked #615.
| Boys | |
|---|---|
| Rank in 2025 | #615 |
| Best rank | #99 (2001) |
| Years in the top 100 | 1 (2001 to 2001) |
| Rank in its biggest decade | #197 in the 2000s |
📍 State-Wise Distribution
People named Colby alive today, by the state where they were born (estimate; state records start in 1910).
More people named Colby were born in Texas than in any other state: about 5,757 of those alive today. Compared with the national rate in the same years, Colby was given 5.8 times as often in Maine, 4.7 times in Vermont and 4 times in New Hampshire.
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