Home / Name Directory / Cailyn
How Many People Are Named Cailyn?
Estimated people named Cailyn living in the U.S. today
5,414
Gender distribution
0% male · 100% female in SSA records.
Name scorecard
- Total U.S. births recorded (1880–2024): 5,509
- Peak year: 2009 (401 births)
- Estimated living today: 5,414
Cailyn by age group — who carries the name today?
Cailyn popularity over time (1880–2024)
Estimated living bearers by birth decade
About the name Cailyn
Cailyn has been recorded by the Social Security Administration since the 19th century dataset began. In total, 5,509 babies were given the name in the United States between 1880 and 2024. After adjusting each birth cohort for survival to today, an estimated 5,414 bearers are still living — roughly 1 in 63,133 Americans. The name's strongest decade shapes how old most Cailyns 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 Cailyn in the US?
An estimated 5,414 people named Cailyn are living in the United States today, based on SSA birth records from 1880 to 2024 adjusted for survival. That makes Cailyn very rare — about 1 in 63,133 Americans.
Is Cailyn a boy or girl name?
In SSA records, Cailyn is 0% male and 100% female, so it is predominantly a female name.
When was Cailyn most popular?
Cailyn peaked in 2009, when 401 babies were given the name. Its current trend is declining compared with the previous decade.
How rare is the name Cailyn?
Cailyn ranks #3,465 of 104,819 first names recorded by the SSA, with a rarity score of 56 out of 100 (higher means rarer).