How Many People Are Named Gillian?
people named Gillian are alive in the United States today (estimate)
About 1 in 21,843 people in the US has this name
Based on 16,127 babies named Gillian in Social Security records from 1922 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
1,030 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Medieval English feminine form of JULIAN. This spelling has been in use since the 13th century, though it was not declared a distinct name from Julian until the 17th century.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
Same Sound, Other Spellings
These names are pronounced like Gillian in English. Counting Gillian and these spellings together, about 97,282 people alive in the US have the name.
⚧ Gender Distribution
Almost all of the babies given the name Gillian (99.6%) were girls.
👥 Age Distribution
The average person named Gillian alive today is about 30 years old, and 63% are under 30. Half of them were between 22 and 38 in 2025.
📈 Popularity Over Time
Gillian first appears in the records in 1922 and was given most often in 1999, to 1,030 babies. In 2025, 47 babies got the name.
Babies given the name each year, 1922 to 2025
🏆 Rank History
Gillian has never been one of the 100 most popular girls' names. Its best rank was #303, in 1999. In 2025 it ranked #3,306.
| Girls | |
|---|---|
| Rank in 2025 | #3,306 |
| Best rank | #303 (1999) |
| Years in the top 100 | None |
| Rank in its biggest decade | #539 in the 2000s |
📍 State-Wise Distribution
People named Gillian alive today, by the state where they were born (estimate; state records start in 1910).
More people named Gillian were born in California than in any other state: about 1,777 of those alive today. Compared with the national rate in the same years, Gillian was given 2.5 times as often in Connecticut, 2.4 times in Massachusetts and 2.1 times in New Jersey.
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