Kathlyn Girl
How popular is Kathlyn?
#4,757 girl name in 2025
28 baby girls were named Kathlyn in the US in 2025, making it the 4757th most popular girl name.
Kathlyn popularity over time
| Rank in 2025 | #4,757 for girls (▼ 2035 from 2024) |
|---|---|
| Babies in 2025 | 28 girls |
| 10-year trend | Rising (+27% babies vs 2015) |
| Earlier ranks | #5,831 in 2015, #10,245 in 2020 |
| Peak year | 1951 (125 girls) |
| Highest rank | #557 in 1914 |
| First recorded | 1897 |
| Boys vs girls (last 10 years) | 0% boys, 100% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Kathlyn counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Kathlyn family of names ranked #2,928 for girls in 2025 (#1,790 the year before), with 34 babies in all.
| Spelling | Girls in 2025 | Share |
|---|---|---|
| Kathlyn | 28 | 82% |
| Kaithlyn | 6 | 18% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Kathlyn is most popular
Babies named Kathlyn per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- Texas: 0.0 per 1,000 (12 girls)
- California: 0.0 per 1,000 (12 girls)
- Florida: 0.0 per 1,000 (6 girls)
- New York: 0.0 per 1,000 (5 girls)
Kathlyn by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1890s | 20 | #1,263 |
| 1900s | 76 | #1,067 |
| 1910s | 565 | #557 |
| 1920s | 512 | #813 |
| 1930s | 268 | #1,197 |
| 1940s | 728 | #795 |
| 1950s | 851 | #793 |
| 1960s | 382 | #1,522 |
| 1970s | 223 | #2,736 |
| 1980s | 382 | #2,115 |
| 1990s | 489 | #1,851 |
| 2000s | 383 | #2,736 |
| 2010s | 152 | #5,831 |
| 2020s | 125 | #2,722 |
Girl names about as popular as Kathlyn
Questions
- Is Kathlyn a boy or girl name?
- Kathlyn is mostly a girl name. Over the last 10 years, 100% of babies named Kathlyn were girls.
- How popular is the name Kathlyn?
- 28 baby girls were named Kathlyn in the US in 2025, making it the 4757th most popular girl name.
- When was Kathlyn most popular?
- Kathlyn peaked in 1951, when 125 girls were given the name. Its highest rank was #557 in 1914.
- How many people are named Kathlyn?
- 5,156 babies have been named Kathlyn in the US since 1880. We estimate about 3,298 of them are alive in 2026, with a median age of 53.
- Where is Kathlyn most popular?
- From 2021 to 2025, Kathlyn was most common in Texas, at 0.0 of every 1,000 girls born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.