Gillian
Gillian was the 3307th most popular name for girls in 2025, given to 47 babies. Its best year was 1999, when it ranked 303rd with 1,022 babies. Over the last ten years it has moved down 1,561 places. More babies were named Gillian in the 2000s than in any other decade.
Meaning Not yet researched how we research meanings
- Rank in 2025
- #3,307 girls, down 238 places since 2020
- Babies in 2025
- 47girls
- Girls and boys
- Almost always a girl’s name2021–2025
- Peak year
- 19991,022 babies
- Total since 1880
- 16,127babies recorded
Gillian popularity since 1880
A few boys are given the name too: 68 since 1978.
| Year | Rank (girls) | Babies (girls) |
|---|---|---|
| 2025 | #3,307 | 47 |
| 2020 | #3,069 | 52 |
| 2010 | #1,154 | 211 |
| 2000 | #325 | 976 |
| 1990 | #822 | 238 |
| 1980 | #886 | 173 |
| 1970 | #998 | 125 |
| 1960 | #2,846 | 19 |
| 1950 | #2,377 | 18 |
| 1940 | #3,634 | 7 |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Gillian, counting every spelling?
Gillian has no other common spelling that sounds the same.
How many kids will share the name Gillian?
47 of the 3,606,400 babies born in the US in 2025 were named Gillian (0.01 per 1,000 births). For a girl named Gillian born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 179 (of 430 pupils) would have a child named Gillian.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Gillian?
About 15,600 people born in the US named Gillian are alive today, with a median age of 27; half are between 23 and 39. That makes Gillian mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Gillian by state
How common Gillian was among girls born in each state in 2021–2025. In 46 states fewer than five girls a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Gillian: their share of US girls followed the most similar curve since 1880. If you like Gillian, they share its era and feel.
Questions about the name Gillian
How popular is the name Gillian?
Gillian was the 3307th most popular name for girls in 2025, given to 47 babies. Its best year was 1999, when it ranked 303rd with 1,022 babies. Over the last ten years it has moved down 1,561 places. More babies were named Gillian in the 2000s than in any other decade.
Is Gillian a boy or girl name?
In 2021–2025, almost always a girl’s name given the name Gillian in the US.
Where is Gillian most popular?
In 2021–2025, Gillian was most common in Tennessee (0.03 per 1,000 girls), followed by California and Ohio.