Cillian
Every Cillian since 1995 — 4,090 of them. Popularity, births, and rankings for each year, from official Social Security records.
The story of Cillian
Cillian is uncommon for boys in the United States, ranked #507 in 2025 with 595 babies given the name. It is currently rising compared with a decade ago.
Since 1995, 4,090 American babies have been named Cillian. Its peak came in 2024, when 674 newborns received the name — the signature sound of the 2020s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Cillian stood among all boys' names in any year, or use the compare tool to plot it against other names.
Cillian year by year
Every year since 2001, and five-year steps back to 1880. Rank is within each sex.
| Year | Girls | Girls rank | Boys | Boys rank |
|---|---|---|---|---|
| 2025 | — | — | 595 | #507 |
| 2024 | 6 | #13,845 | 668 | #463 |
| 2023 | — | — | 477 | #594 |
| 2022 | — | — | 353 | #736 |
| 2021 | — | — | 341 | #747 |
| 2020 | — | — | 228 | #957 |
| 2019 | — | — | 186 | #1,078 |
| 2018 | — | — | 193 | #1,052 |
| 2017 | — | — | 170 | #1,126 |
| 2016 | — | — | 177 | #1,107 |
| 2015 | — | — | 121 | #1,418 |
| 2014 | — | — | 87 | #1,734 |
| 2013 | — | — | 77 | #1,853 |
| 2012 | — | — | 73 | #1,946 |
| 2011 | — | — | 66 | #2,040 |
| 2010 | — | — | 54 | #2,359 |
| 2009 | — | — | 52 | #2,458 |
| 2008 | — | — | 51 | #2,477 |
| 2007 | — | — | 39 | #2,982 |
| 2006 | — | — | 42 | #2,750 |
| 2005 | — | — | 10 | #7,207 |
| 2004 | — | — | 8 | #8,267 |
| 2003 | — | — | — | — |
| 2002 | — | — | — | — |
| 2001 | — | — | 6 | #9,466 |
| 2000 | — | — | — | — |
| 1995 | — | — | 5 | #9,095 |
| 1990 | — | — | — | — |
| 1985 | — | — | — | — |
| 1980 | — | — | — | — |
| 1975 | — | — | — | — |
| 1970 | — | — | — | — |
| 1965 | — | — | — | — |
| 1960 | — | — | — | — |
| 1955 | — | — | — | — |
| 1950 | — | — | — | — |
| 1945 | — | — | — | — |
| 1940 | — | — | — | — |
| 1935 | — | — | — | — |
| 1930 | — | — | — | — |
| 1925 | — | — | — | — |
| 1920 | — | — | — | — |
| 1915 | — | — | — | — |
| 1910 | — | — | — | — |
| 1905 | — | — | — | — |
| 1900 | — | — | — | — |
| 1895 | — | — | — | — |
| 1890 | — | — | — | — |
| 1885 | — | — | — | — |
| 1880 | — | — | — | — |
Famous people named Cillian
- Cillian Murphy Actor · b. 1976
- Cillian Sheridan Soccer player · b. 1989
Ranked by global fame across Wikipedia editions (Pantheon project, MIT).
Frequently asked questions
How popular is the name Cillian in 2025?
Cillian ranked #507 among boys' names in the United States in 2025, with 595 babies given the name, according to Social Security Administration data.
How many people are named Cillian?
4,090 babies have been named Cillian in the United States since 1995, based on Social Security card applications.
When was the name Cillian most popular?
Cillian peaked in 2024, when 674 newborns received the name.
Is Cillian a boy or girl name?
Cillian is overwhelmingly a boy's name — 100% of babies with the name.
Is the name Cillian rising or falling?
Cillian is on the rise — noticeably more popular now than a decade ago.
Who are famous people named Cillian?
Well-known people named Cillian include Cillian Murphy (actor), Cillian Sheridan (soccer player).