How Many People Are Named Duncan?
people named Duncan are alive in the United States today (estimate)
About 1 in 19,932 people in the US has this name
Based on 21,230 babies named Duncan in Social Security records from 1880 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
644 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Anglicized form of the Gaelic name Donnchadh, derived from Gaelic donn "brown" and cath "battle". This was the name of two kings of Scotland, including the one who was featured in Shakespeare's play 'Macbeth' (1606).
Source of the meaning, origin, pronunciation and related names: Behind the Name.
Related & Similar Names
⚧ Gender Distribution
Almost all of the babies given the name Duncan (99.9%) were boys.
👥 Age Distribution
The average person named Duncan alive today is about 31 years old, and 59% are under 30. Half of them were between 16 and 41 in 2025.
📈 Popularity Over Time
Duncan first appears in the records in 1880 and was given most often in 1997, to 644 babies. In 2025, 190 babies got the name.
Babies given the name each year, 1880 to 2025
🏆 Rank History
Duncan has never been one of the 100 most popular boys' names. Its best rank was #378, in 1997. In 2025 it ranked #1,124.
| Boys | |
|---|---|
| Rank in 2025 | #1,124 |
| Best rank | #378 (1997) |
| Years in the top 100 | None |
| Rank in its biggest decade | #503 in the 1990s |
📍 State-Wise Distribution
People named Duncan alive today, by the state where they were born (estimate; state records start in 1910).
More people named Duncan were born in California than in any other state: about 1,642 of those alive today. Compared with the national rate in the same years, Duncan was given 2.4 times as often in Massachusetts, 2.2 times in Washington and 2.1 times in Utah.
Look up another name
⊙ We don't save the names you search.