Home / Name Directory / Cailin
How Many People Are Named Cailin?
Estimated people named Cailin living in the U.S. today
3,647
Gender distribution
1% male · 99% female in SSA records.
Name scorecard
- Total U.S. births recorded (1880–2024): 3,736
- Peak year: 1998 (169 births)
- Estimated living today: 3,647
Cailin by age group — who carries the name today?
Cailin popularity over time (1880–2024)
Estimated living bearers by birth decade
About the name Cailin
Cailin has been recorded by the Social Security Administration since the 19th century dataset began. In total, 3,736 babies were given the name in the United States between 1880 and 2024. After adjusting each birth cohort for survival to today, an estimated 3,647 bearers are still living — roughly 1 in 93,721 Americans. The name's strongest decade shapes how old most Cailins 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 Cailin in the US?
An estimated 3,647 people named Cailin are living in the United States today, based on SSA birth records from 1880 to 2024 adjusted for survival. That makes Cailin very rare — about 1 in 93,721 Americans.
Is Cailin a boy or girl name?
In SSA records, Cailin is 1% male and 99% female, so it is predominantly a female name.
When was Cailin most popular?
Cailin peaked in 1998, when 169 babies were given the name. Its current trend is declining compared with the previous decade.
How rare is the name Cailin?
Cailin ranks #4,457 of 104,819 first names recorded by the SSA, with a rarity score of 58 out of 100 (higher means rarer).