An estimated 80,645 living Americans are named Jillian.
How rare is Jillian?
Jillian is uncommon among babies today, with 177 girls receiving the name in 2025, down 94.2% from its 1982 peak.
How old is the typical Jillian?
The median age of a living American named Jillian is approximately 31 years, with most bearers falling between 22 and 40 years old.
Is Jillian still popular?
No. Jillian is endangered as a baby name, down 94.2% from its 1982 peak with 177 births in 2025.
Where is Jillian most common?
Jillian has its strongest geographic signal in New Hampshire, where it appears 4.6× more often than the national baseline.
1944Peak 19822025
Peak year
1982
Decline from peak
94.2%
2025
177
All-time
83,197
Diaspora map
Jillian broke out in Connecticut, Delaware, Maine, Massachusetts, Minnesota, Montana, New Hampshire, New York, and Rhode Island (1977) and became over-represented in 34 states over 37 years.
Broke out: Connecticut, Delaware, Maine, Massachusetts, Minnesota, Montana, New Hampshire, New York, and Rhode Island, 1977 · over-represented in 34 states over 37 years
