Reilly
How to say it: RY-lee · /ˈraɪli/
Anglicized form of Irish O'Raghallaigh; meaning uncertain, possibly 'courageous' or 'valiant'.
Reilly was the 19th most popular girls’ name in the United States in 2025, given to 108 babies of either sex (Social Security Administration). Its busiest decade was the 2000s, its births are down about 24% in ten years, and it is projected to slip to #38 by 2030.
Updated · SSA 2025 data, published May 2026 · Insee 2025 data, published July 2026 · How we compute these figures
Key facts
| Rank among girls’ names, 2025 | #19 |
|---|---|
| Babies born in 2025 (both sexes) | 108 |
| Share of births | 1 in 349 |
| Peak decade | 2000s |
| Change over 10 years | −24% |
| Projected rank for 2030 (estimate) | #38 |
| In France, 2025 | #756 among girls’ names, 0 births |
Sources: Social Security Administration (SSA), Insee (France). How we compute these figures.
Its life, decade by decade
Reilly is a newcomer: almost all of its history is from the last forty years.
What goes with it
Nicknames
- Rei
- Riley
- Lee
Honouring a Reilly in the family
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Reilly is about 1 in 15.
Around the world
This spelling is used in English, Irish.
In France: #756 for girls in 2025.
Famous people named Reilly
- Reilly Opelka (born 1997)American tennis player
- Reilly Smith (born 1991)Canadian ice hockey player
From Wikidata and Wikipedia
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