The Kowalczyk surname
In the 2010 U.S. Census, 5,615 people carried this name — #6,107 among all U.S. surnames, about 1 in every 52,600 people counted. That is up 4% from 5,425 in 2000.
Where the name comes from
The origin of the Kowalczyk surname
A male surname; one of the most popular surnames in Poland.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Kowalczyk» (Polish), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In Poland’s population register
87,889 people named Kowalczyk have a registered home in Poland.
Of the 95,258 in Poland’s national register, these are the ones with a permanent address on file. They live in all 16 of Poland’s voivodeships, most of all in Masovian.
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 592 people named Kowalczyk.
243 of them were born outside France. Those born in France came from 40 départements, most often Pas-de-Calais.
Where it concentrates, on the mapWhere they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In Belgium’s population register
At least 126 people named Kowalczyk live in Belgium.
Statbel only publishes a name in a municipality when five or more people there share it, so the real number is higher. Most of them live in Antwerp.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In Switzerland’s population statistics
112 people named Kowalczyk live in Switzerland.
They live in 14 of Switzerland’s 26 cantons, most of all in Zurich.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
In Argentina’s national register
At least 56 people named Kowalczyk live in Argentina.
RENAPER only publishes a name in a province when more than ten people there share it, so the real number is higher. Most of them live in Misiones.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In the Nordic population registers
501 people named Kowalczyk are counted in Norway and Sweden.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published. Norway publishes only surnames with 200 or more bearers.
Counted, by country
Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown) · Statistics Norway (SSB, ssb.no), table 12891, 2025 — CC BY 4.0.
In print
Kowalczyk in American newspapers,
1905–1960.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 3,284 pages in all carry the name.
Who carried it
People named Kowalczyk,
with a public archive behind them.
-
Jan Kowalczyk 1833–1911 · astronomer -
Anton Kowalczyk 1866–1947 · missionary -
Jan Jakub Kowalczyk 1872–1941 · politician -
Tomasz Kowalczyk 1879–1963 -
Adam Kowalczyk 1894–1940 · military officer
Wikidata and Wikimedia Commons (CC0) · 264 lives in all are documented under this name.
Nearby in the index
Surnames next to Kowalczyk.
- Kouyoumdjian 275 · U.S. census
- Kovac 2,795 · U.S. census
- Kovacevic 1,256 · U.S. census
- Kovacic 975 · U.S. census
- Kovacs 9,072 · U.S. census
- Kowal 4,337 · U.S. census
- Kowalewski 2,718 · U.S. census
- Kowalik 1,435 · U.S. census
- Kowalska 153 · U.S. census
- Kowalski 18,077 · U.S. census
- Koza 1,469 · U.S. census
- Kozak 7,495 · U.S. census
When the index is not enough
This page says where Kowalczyk 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.