Reilly is a unisex name with a modern feel, drawn from real birth records. Below you'll find what Reilly means and where it comes from, plus how many babies have been named Reilly across the United States, UK, Ireland and New Zealand, how popular Reilly has been over the decades, and the year it peaked.
Reilly is a unisex name of Irish (Gaelic) origin meaning “courageous, valiant”. An Irish surname used as a given name.
| Country | Births on record |
|---|---|
| United States since 1880 | 10,088 births |
| England & Wales since 1996 | 756 births |
| Scotland since 1974 | 156 births |
| Northern Ireland since 1997 | 24 births |
| Ireland since 1964 | 10 births |
Counts come from official national birth-registration statistics: U.S. Social Security Administration, England & Wales (Office for National Statistics), Scotland (National Records of Scotland), Northern Ireland (NISRA), Ireland (Central Statistics Office) and New Zealand (Dept. of Internal Affairs). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Reilly per year, United States (1953 to 2025). United States peaked in 1997 (543/yr) · England & Wales peaked in 2012 (67/yr) · Scotland peaked in 2012 (19/yr) · Northern Ireland peaked in 2008 (5/yr) · Ireland peaked in 2018 (4/yr).
Reilly has been a fairly common baby name in the United States. It was most common in 1997, when it ranked #872 nationally (given to 546 babies that year).
Riley · Ryley · Rilla · Roll · Rolla · Rilee · Rollo · Reyli
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