Costello
- US rank
- #10,695
- Syllables
- 3
- Peak
- #2,367 in 1951
6 babies were named Costello in the US in 2025.
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US births per million boys, 1942–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Costello you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 285,714 baby boys born in the US in 2025 was named Costello, 6 babies in all. In a typical school of 500 kids, your Costello would very likely be the only one.
- HistoryCostello first shows up in US birth records in 1931, the first year at least 5 babies got it. It has been in use for 94 years since.
- Best yearIt was far more popular in 1951, when it ranked #2,367. Today it's #10,695, so it could be due a comeback.
About the name Costello
Costello is a boy name of Irish origin. It has 8 letters and 3 syllables, starting with C and ending in “-llo”. US birth records list Costello for boys from 1942 to 2025, in 11 of those 84 years. Its best year was 1951, when it ranked #2,367 among boy names. In 2025 it ranked #10,695, with 6 babies.
Origin:Irish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1940s | 0.5 | 2,222,222 boys |
| 1950s | 1.1 | 869,565 boys |
| 1970s | 0.7 | 1,428,571 boys |
| 2000s | 0.6 | 1,694,915 boys |
| 2010s | 0.3 | 3,846,154 boys |
| 2020s | 1.1 | 937,500 boys |
More Irish boy names
- Boy name: Liam · resolute protector
- Unisex name: Owen · well-born
- Unisex name: Logan · little hollow
- Unisex name: Nolan · descendant of Nuallán
- Unisex name: Gael · a Gael
- Boy name: Arthur · possibly bear
- Unisex name: Ryan · little king
- Boy name: Dominic · of the Lord
Questions about the name Costello
What is the origin of the name Costello?
Costello has Irish roots in our records. Other Irish names include Liam, Owen, Logan.
Is Costello a boy or girl name?
Costello is a boy name.
How popular is the name Costello?
Costello ranked #10,695 for US boys in 2025, given to 6 babies. Its best year was 1951 (#2,367).