Reilly
Gender-neutral name · Celtic · Irish
- US rank
- #2,822
- Syllables
- 2
- Peak
- #622 in 1997
60 babies were named Reilly in the US in 2025. It has dropped 606 places in five years.
Found on lists
Save adds it to your list. Vote moves it up the top voted names.
US births per million girls, 1978–2025
US births per million boys, 1953–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Reilly you might not know, from US birth records and Wikipedia. Handy for convincing a partner, or a grandparent.
Famous Reilly
Reilly Opelka
American tennis player (born 1997)
Choose Reilly and your child shares a first name with Reilly Opelka, an American tennis player. A ready-made answer when someone asks “Reilly, like who?” Reilly Opelka's Wikipedia article is available in 23 languages, a good sign of just how widely known they are.
Read about Reilly Opelka on Wikipedia (opens in a new tab)Photo: si.robi, CC BY-SA 2.0 (opens in a new tab), via Wikimedia Commons
- How commonAbout 1 in every 26,810 baby girls born in the US in 2025 was named Reilly, 60 babies in all. In a typical school of 500 kids, your Reilly would very likely be the only one.
- HistoryReilly first shows up in US birth records in 1953, the first year at least 5 babies got it. It has been in use for 72 years since.
- Best yearIt was far more popular in 1997, when it ranked #622. Today it's #2,822, so it could be due a comeback.
- Then vs nowReilly was 4.3× more common in 2000 than it is today. In 2000 it was given to about 1 in 6,285 baby girls; in 2025, about 1 in 26,810.
- TrendReilly has slipped 606 places over the last five years and now sits at #2,822. Good news if you want a familiar name that fewer kids will share.
- Boy or girlReilly is given to both boys and girls: 56% of the 108 babies named Reilly in 2025 were girls. That makes it one of the names that truly works for either.
About the name Reilly
Reilly is a gender-neutral name of Celtic and Irish origin. It has 6 letters and 2 syllables, starting with R and ending in “-lly”. US birth records list Reilly for girls from 1978 to 2025, in 47 of those 48 years. Its best year was 1997, when it ranked #622 among girl names. In 2025 it ranked #2,822, with 60 babies. Of the 108 US babies named Reilly in 2025, 56% were girls and 44% were boys.
Origin:Celtic namesIrish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1970s | 1.9 | 512,821 girls |
| 1980s | 6.2 | 160,772 girls |
| 1990s | 90 | 11,096 girls |
| 2000s | 132 | 7,549 girls |
| 2010s | 57 | 17,609 girls |
| 2020s | 40 | 25,284 girls |
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1950s | 0.9 | 1,111,111 boys |
| 1970s | 1.1 | 909,091 boys |
| 1980s | 11 | 90,334 boys |
| 1990s | 54 | 18,643 boys |
| 2000s | 96 | 10,416 boys |
| 2010s | 56 | 17,828 boys |
| 2020s | 30 | 32,823 boys |
Other spellings of Reilly
More Celtic names
- Girl name: Evelyn · possibly desired
- Girl name: Isla · from Islay
- Unisex name: Owen · well-born
- Unisex name: Riley · rye clearing
- Unisex name: Logan · little hollow
- Unisex name: Rowan · little red-haired one
- Unisex name: Nolan · descendant of Nuallán
- Unisex name: Cameron · crooked nose
Questions about the name Reilly
What is the origin of the name Reilly?
Reilly has Celtic, Irish roots in our records. Other Celtic names include Evelyn, Isla, Owen.
Is Reilly a boy or girl name?
Both. Reilly is used for boys and girls: in 2025, 56% of US babies named Reilly were girls.
How popular is the name Reilly?
Reilly ranked #2,822 for US girls in 2025, given to 60 babies. Its best year was 1997 (#622).