How Many People Are Named Jillian?
An estimated 80,195 people in the United States have the first name Jillian. It is almost exclusively a female name. The average bearer is 30 years old, and Jillian peaked in popularity in 1982 with 3,070 births that year.
Below you will find a full statistical profile of Jillian as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Jillian paired with any surname.
Key Insights
- While Jillian is overwhelmingly female, 227 male births have been registered with this name since 1880.
- Jillian has fallen dramatically from its peak in the 1980s. Recent registrations are less than 5% of what they were at the name's height.
Estimated Living Americans
80,195
About 1 in 4,274 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
99.7% confidence
Average Age
30
years old
Peak Year
1982
3,070 births
Total Registered
83,245
since 1880
Gender Distribution for Jillian
Jillian is almost exclusively a female name. Out of 83,245 total births registered, 99.7% were female.
Jillian as a male name
Ranked #13,372 in 2009
5 male births in 2009
Peak: 1989 (18 births)
Jillian as a female name
Ranked #1,132 in 2024
213 female births in 2024
Peak: 1982 (3,056 births)
Jillian: Popularity Over Time
SSA records for Jillian span from the 1940s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 1980s, when 25,574 babies were registered. Jillian has declined significantly from its peak in the 1980s. Recent registrations are a fraction of what they were at the name's height.
Jillian by Decade
How has Jillian tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Jillian by State
Birth registrations for Jillian span all 51 states and territories in the SSA database. The highest counts are in New York, California, Massachusetts. The lowest are in Wyoming, North Dakota, District of Columbia. On average, about 1,597 Jillians were registered per state.
Jillian + Last Name Combinations
How many people share a full name with Jillian as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Jillian
Other first names starting with J with a similar number of bearers.
Jillian: Questions and Answers
How many people in the U.S. are named Jillian?
We estimate approximately 80,195 people named Jillian are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 4,274 Americans share this first name.
Is Jillian a common name?
Jillian is classified as "Uncommon" and is more popular than 99.4% of all first names in the SSA database. A total of 83,245 births have been registered with this name since 1880.
When was Jillian most popular?
Jillian reached peak popularity in 1982, when 3,070 babies were given this name. The average age of a living person named Jillian is approximately 30 years old, reflecting when the name was most commonly given.
Is Jillian a female name?
Jillian is predominantly female. 99.7% of people with this name are female. See the gender breakdown above for full details.
How many Jillian Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Jillian Smith, Jillian Johnson, Jillian Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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