65,785births recorded
12Countries
1Variants
1946Peak · South Australia
#228England & Wales 2025
Rex is a boy name family recorded 65,785 times in 12 countries since 1880. It ranks highest today in England & Wales (#228 in 2025). Its all-time peak was in South Australia in 1946, at 112.2 births per 100,000.
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
All forms of Rex
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Rex | English | 60,590 | 🇺🇸 United States | #859 | 1951 | ▼ 16 % |
| Rex | English | 4,238 | 🏴 England & Wales | #228 | 2020 | ▶ 0 % |
| Rex | English | 306 | 🇨🇦 Ontario | #1217 | 2018 | ▼ 13 % |
| Rex | English | 186 | 🇦🇺 South Australia | – | 1946 | – |
| Rex | English | 134 | 🏴 Scotland | – | 2020 | – |
| Rex | English | 125 | 🇨🇦 British Columbia | #354 | 2017 | ▲ 87 % |
Questions about Rex
How popular is the name Rex?
In 2025 it ranked #228 in England & Wales. Official registers record 65,785 births across 12 countries.
When was Rex most popular?
It peaked in South Australia in 1946, at 112.2 births per 100,000.
Is Rex a boy or a girl name?
In official birth registers, Rex is a boy name.