Kasyn
Boy name · #1804 in 2025 · Very rare
How old is the name Kasyn? In official American birth records, Kasyn has been tracked continuously since 2003, giving it 22 years of documented American history.
Kasyn ranks #1804 among American boys' names as of 2025, with 89 newborns given the name that year. A decade ago it stood at #2036, so the name has been rising over the past ten years. Roughly one in every 20,225 boys born in 2025 was named Kasyn.
Babies named Kasyn per year. Source: Official national birth records.
The 22-year story
Kasyn first appears in the Social Security records in 2003, when 7 boys received the name. Its peak came in 2020, when 103 boys were named Kasyn — good for #1579 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Kasyn against up to 5 other names.
Uniqueness: will there be another Kasyn in class?
On our rarity read — which blends how common Kasyn is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Kasyn will likely be the only one in the room, with the occasional spelling-out as the price.
Where Kasyn is most common
State-level data for Kasyn is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Kasyn
Statistically, parents drawn to Kasyn tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Karsyn, Kaisyn, Kaesyn, Hudsyn, and Carsyn.
KarsynKaisynKaesynHudsynCarsynKorbynKamdynKysen
Rank history (last 25 years)
| Year | Babies named Kasyn | Rank |
|---|---|---|
| 2025 | 89 | #1793 |
| 2024 | 73 | #2057 |
| 2023 | 83 | #1896 |
| 2022 | 87 | #1839 |
| 2021 | 88 | #1789 |
| 2020 | 103 | #1579 |
| 2019 | 90 | #1737 |
| 2018 | 81 | #1856 |
| 2017 | 81 | #1829 |
| 2016 | 85 | #1788 |
| 2015 | 70 | #2036 |
| 2014 | 81 | #1828 |
| 2013 | 68 | #2009 |
| 2012 | 64 | #2104 |
| 2011 | 61 | #2145 |
| 2010 | 56 | #2287 |
| 2009 | 45 | #2702 |
| 2008 | 39 | #3005 |
| 2007 | 29 | #3591 |
| 2006 | 15 | #5525 |
| 2005 | 9 | #7640 |
| 2004 | 9 | #7536 |
| 2003 | 7 | #8643 |
Frequently asked questions
How old is the name Kasyn?
In official American birth records, the name Kasyn first appeared in 2003 (over 22 years ago), when 7 newborn boys received the name. It has been tracked in modern national records for 22 years.
Is Kasyn a popular boy name?
Kasyn ranked #1804 among boys in 2025 with 89 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #2036.
When was the name Kasyn most popular?
Kasyn peaked in 2020, when 103 American boys received the name (ranked #1579 that year). Since 2020 the name has declined from that high.
How rare is the name Kasyn?
In 2025, roughly 1 in 20,225 newborn American boys was named Kasyn. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.