The Karolczak surname
In the 2010 U.S. Census, 114 people carried this name — #145,220 among all U.S. surnames, about 1 in every 2,500,000 people counted. That is down 2% from 116 in 2000.
In Poland’s population register
2,112 people named Karolczak have a registered home in Poland.
Of the 2,290 in Poland’s national register, these are the ones with a permanent address on file. They live in 15 of Poland’s 16 voivodeships, most of all in Greater Poland.
Where it concentrates, on the mapWhere they live today
PESEL register, Ministry of Digital Affairs of Poland (dane.gov.pl) — CC0 · living people by voivodeship of permanent residence, 20 January 2026.
In France’s civil register
France’s register of deaths holds 62 people named Karolczak.
18 of them were born outside France. Those born in France came from 5 départements, most often Nord.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
Who carried it
People named Karolczak,
with a public archive behind them.
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Ludwik Karolczak 1916–2003
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Irena Karolczak 1943– · badminton player
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Maciej A Karolczak 1954– · physician
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Kazimierz Karolczak 1954– · historian
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Kazimierz Karolczak 1974– · politician
Wikidata (CC0).
Nearby in the index
Surnames next to Karolczak.
- Karl 6,564 · U.S. census
- Karle 1,768 · U.S. census
- Karm 291 · U.S. census
- Karman 608 · U.S. census
- Karmann 285 · U.S. census
- Karolak 173 · U.S. census
- Karolewicz 142 · U.S. census
- Karp 5,577 · U.S. census
- Karpinski 2,731 · U.S. census
- Karr 10,324 · U.S. census
- Karrer 605 · U.S. census
- Karst 1,958 · U.S. census
When the index is not enough
This page says where Karolczak is.
A volume says what happened to it.
Every page in the index is free and stays free. The Heritage Volume is the long form: the full paper trail, the arms, the crossing — bound, and yours.