Masculine dossier · first seen 1880
Dennis
Endangered
Down 98.4% from peak
Peak era
1952
Peak births
24,552
Current vitality
Fragile
Peak generation
Boomer
Quick answers about Dennis
How many people are named Dennis?
An estimated 368,451 living Americans are named Dennis.
How rare is Dennis?
Dennis is uncommon among babies today, with 381 boys receiving the name in 2025, down 98.4% from its 1952 peak.
How old is the typical Dennis?
The median age of a living American named Dennis is approximately 66 years, with most bearers falling between 53 and 74 years old.
Is Dennis still popular?
No. Dennis is endangered as a baby name, down 98.4% from its 1952 peak with 381 births in 2025.
Where is Dennis most common?
Dennis has its strongest geographic signal in North Dakota, where it appears 4.7× more often than the national baseline.
1880Peak 19522025
Peak year
1952
Decline from peak
98.4%
2025
381
All-time
621,000
Where it lives now
Dennis is most concentrated in North Dakota — about 4.7× the national rate in the 1930s. It also runs high in Minnesota and South Dakota.
States where Dennis is given more often than the national average — its present-day heartland.