How Many People Are Named Kolby?
people named Kolby are alive in the United States today (estimate)
About 1 in 26,802 people in the US has this name
Based on 13,001 babies named Kolby in Social Security records from 1968 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
781 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Variant of COLBY.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
Same Sound, Other Spellings
These names are pronounced like Kolby in English. Counting Kolby 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 Kolby, 10.5% were girls and 89.5% were boys. The share has stayed close to this since the 1970s: 7.8% of the babies were girls then and 17.2% in the 2020s.
👥 Age Distribution
The average person named Kolby alive today is about 21 years old, and 82% are under 30. Half of them were between 13 and 27 in 2025.
📈 Popularity Over Time
Kolby first appears in the records in 1968 and was given most often in 2001, to 781 babies. In 2025, 207 babies got the name.
Babies given the name each year, 1968 to 2025
🏆 Rank History
Kolby has never been one of the 100 most popular boys' names. Its best rank was #359, in 2001. In 2025 it ranked #1,225. Among girls, its best rank was #2,686, in 1999.
| Boys | Girls | |
|---|---|---|
| Rank in 2025 | #1,225 | #3,617 |
| Best rank | #359 (2001) | #2,686 (1999) |
| Years in the top 100 | None | None |
| Rank in its biggest decade | #525 in the 2000s | #4,277 in the 2010s |
📍 State-Wise Distribution
People named Kolby alive today, by the state where they were born (estimate; state records start in 1910).
More people named Kolby were born in Texas than in any other state: about 1,348 of those alive today. Compared with the national rate in the same years, Kolby was given 4 times as often in Utah, 3.7 times in Idaho and 3.5 times in Oklahoma.
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