Home / Name Directory / Rex
How Many People Are Named Rex?
Estimated people named Rex living in the U.S. today
36,711
Gender distribution
100% male · 0% female in SSA records.
Name scorecard
- Total U.S. births recorded (1880–2024): 60,301
- Peak year: 1952 (1,505 births)
- Estimated living today: 36,711
Rex by age group — who carries the name today?
Rex popularity over time (1880–2024)
Estimated living bearers by birth decade
About the name Rex
Rex has been recorded by the Social Security Administration since the 19th century dataset began. In total, 60,301 babies were given the name in the United States between 1880 and 2024. After adjusting each birth cohort for survival to today, an estimated 36,711 bearers are still living — roughly 1 in 9,311 Americans. The name's strongest decade shapes how old most Rexs you meet will be, which the age-group breakdown above shows directly. All figures are statistical estimates from public records; see our methodology for sources, the survival model, and the limits of the data (names given to fewer than five babies in a year are not published by the SSA).
Frequently asked questions
How many people are named Rex in the US?
An estimated 36,711 people named Rex are living in the United States today, based on SSA birth records from 1880 to 2024 adjusted for survival. That makes Rex rare — about 1 in 9,311 Americans.
Is Rex a boy or girl name?
In SSA records, Rex is 100% male and 0% female, so it is predominantly a male name.
When was Rex most popular?
Rex peaked in 1952, when 1,505 babies were given the name. Its current trend is rising compared with the previous decade.
How rare is the name Rex?
Rex ranks #1,107 of 104,819 first names recorded by the SSA, with a rarity score of 47 out of 100 (higher means rarer).