Kacper
Kacper was given to 11 boys in 2025, #7,408 among boys’ names; 1,102 Americans have been recorded with it since 1994 (Social Security Administration, published May 2026).
An estimated 1,090 Americans named Kacper and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 18 years old and half are between 13 and 21.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Kacper by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Kacper mean?
Wiktionary, Polish section
Kacper is “a male given name, equivalent to English Casper or Jasper”
/ˈkat͡s.pɛr/
Meaning: Wiktionary, Polish section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Kacper?
#7,408 among boys’ names, 2025
Kacper fell from #3,632 in 2015 to #7,408 in 2025 among boys’ names; its share of boys born fell from 15.7 to 6.4 per million.
88 babies in 2007, the peak
Kacper peaked in 2007, when 88 boys were given it, #1,714 among boys’ names. The 11 births of 2025 are 13% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 11 | #7,408 | 6.4 |
| 2024 | 17 | #5,546 | 9.9 |
| 2023 | 12 | #7,090 | 7.0 |
| 2022 | 14 | #6,304 | 8.0 |
| 2021 | 11 | #7,343 | 6.3 |
| 2020 | 11 | #7,245 | 6.4 |
| 2019 | 23 | #4,405 | 12.8 |
| 2018 | 32 | #3,473 | 17.6 |
| 2017 | 19 | #5,015 | 10.3 |
| 2016 | 45 | #2,704 | 23.7 |
Every recorded year (32)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2015 | 30 | #3,632 | 15.7 |
| 2014 | 43 | #2,775 | 22.4 |
| 2013 | 36 | #3,091 | 19.0 |
| 2012 | 62 | #2,166 | 32.7 |
| 2011 | 54 | #2,359 | 28.4 |
| 2010 | 56 | #2,301 | 29.2 |
| 2009 | 57 | #2,307 | 28.7 |
| 2008 | 76 | #1,909 | 37.3 |
| 2007 | 88 | #1,714 | 42.4 |
| 2006 | 87 | #1,651 | 42.3 |
| 2005 | 65 | #1,948 | 32.5 |
| 2004 | 65 | #1,895 | 32.7 |
| 2003 | 42 | #2,484 | 21.3 |
| 2002 | 23 | #3,720 | 11.8 |
| 2001 | 29 | #3,099 | 14.9 |
| 2000 | 31 | #2,885 | 15.8 |
| 1999 | 13 | #5,168 | 6.8 |
| 1998 | 13 | #5,017 | 6.8 |
| 1997 | 7 | #7,682 | 3.7 |
| 1996 | 9 | #6,240 | 4.8 |
| 1995 | 11 | #5,313 | 5.8 |
| 1994 | 10 | #5,659 | 5.2 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Kacper a boy’s or a girl’s name?
Kacper has been recorded only for boys: SSA lists no girls with the name in 32 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Kacper: the SSA national file counts each sex separately.
How many people are named Kacper, and how old are they?
1,090 alive in 2026, estimated
That is 99% of the 1,102 Americans ever recorded as Kacper. The median Kacper alive today is 18 years old; half are between 13 and 21.
The 2020 Census counted 1,066 people named Kacper (2 women and girls, 1,064 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 1,019 born in the U.S. The Census count is 5% above that prediction.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Millennials | 1981-1996 | 29 |
| Generation Z | 1997-2012 | 757 |
| Generation Alpha | 2013-2025 | 302 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Kacper born?
The states with the most babies named Kacper are Illinois, New York and New Jersey, with 98% of its births recorded by state since 1910; New Jersey is not among the ten states with the most births.
| State | Since 1910 | Rank, boys | vs. national |
|---|---|---|---|
| Illinois | 541 | not ranked | 11.8× |
| New York | 202 | not ranked | 3.0× |
| New Jersey | 76 | not ranked | 2.5× |
| Connecticut | 17 | not ranked | 1.4× |
Where Kacper is more common than its national share predicts
Relative to its national share, Kacper is most over-represented in Illinois: since 1994 it was given 11.8 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Kacper with the births its national share predicts year by year, for states with at least 100 births of the name.
Names that rose and fell in the same decades as Kacper
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Kacper and names like it
- Compare Kacper and BrodenBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2000sKacper peaked in 2007.
- Illinois’s most given namesThe state where SSA recorded the most babies named Kacper since 1910.
- Polish namesWiktionary’s origin for Kacper: every such name, by how often it is given.
- The top names of 2007The year the most babies were named Kacper.
- The names of Generation ZMost people named Kacper alive today were born 1997-2012.
- Names starting with KMost given first.