Duncan Boy
How popular is Duncan?
#1,123 boy name in 2025
190 baby boys were named Duncan in the US in 2025, making it the 1123rd most popular boy name.
17,262living people named Duncan (est.)
28median age of people named Duncan
21,230babies named Duncan since 1880
1 in 17,449US babies born in 2025
Duncan popularity over time
Boys Girls
| Rank in 2025 | #1,123 for boys (▼ 20 from 2024) |
|---|---|
| Babies in 2025 | 190 boys |
| 10-year trend | Falling (-35% babies vs 2015) |
| Earlier ranks | #790 in 2015, #982 in 2020 |
| Peak year | 1997 (644 boys) |
| Highest rank | #378 in 1997 |
| First recorded | 1880 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.1% in a class of 25 kids born in 2025 |
Where Duncan is most popular
Babies named Duncan per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFL
- Utah: 0.3 per 1,000 (27 boys)
- Wisconsin: 0.3 per 1,000 (32 boys)
- Minnesota: 0.3 per 1,000 (33 boys)
- Washington: 0.3 per 1,000 (42 boys)
- Idaho: 0.2 per 1,000 (10 boys)
Duncan by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1880s | 139 | #392 |
| 1890s | 117 | #445 |
| 1900s | 116 | #550 |
| 1910s | 542 | #599 |
| 1920s | 767 | #663 |
| 1930s | 653 | #713 |
| 1940s | 1,178 | #535 |
| 1950s | 1,783 | #471 |
| 1960s | 1,389 | #492 |
| 1970s | 933 | #712 |
| 1980s | 1,414 | #687 |
| 1990s | 4,221 | #378 |
| 2000s | 3,965 | #447 |
| 2010s | 2,687 | #708 |
| 2020s | 1,315 | #913 |
Boy names about as popular as Duncan
Questions
- Is Duncan a boy or girl name?
- Duncan is mostly a boy name. Over the last 10 years, 100% of babies named Duncan were boys.
- How popular is the name Duncan?
- 190 baby boys were named Duncan in the US in 2025, making it the 1123rd most popular boy name.
- When was Duncan most popular?
- Duncan peaked in 1997, when 644 boys were given the name. Its highest rank was #378 in 1997.
- How many people are named Duncan?
- 21,230 babies have been named Duncan in the US since 1880. We estimate about 17,262 of them are alive in 2026, with a median age of 28.
- Where is Duncan most popular?
- From 2021 to 2025, Duncan was most common in Utah, at 0.3 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.