The Kaczor surname
In the 2010 U.S. Census, 1,711 people carried this name — #16,720 among all U.S. surnames, about 1 in every 172,400 people counted. That is up 4% from 1,650 in 2000.
In Poland’s population register
13,019 people named Kaczor have a registered home in Poland.
Of the 14,122 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 Lesser 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 150 people named Kaczor.
59 of them were born outside France. Those born in France came from 17 départements, most often Pas-de-Calais.
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.
In Argentina’s national register
At least 30 people named Kaczor 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 Buenos Aires Province.
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 Switzerland’s population statistics
26 people named Kaczor live in Switzerland.
They live in 5 of Switzerland’s 26 cantons, most of all in Vaud.
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 · names with fewer than 3 bearers in a canton are not published.
Nearby in the index
Surnames next to Kaczor.
- Kaba 1,991 · U.S. census
- Kacher 274 · U.S. census
- Kaczka 255 · U.S. census
- Kaczmarczyk 1,275 · U.S. census
- Kaczmarek 4,052 · U.S. census
- Kaczmarski 704 · U.S. census
- Kaczorowski 839 · U.S. census
- Kada 212 · U.S. census
- Kader 969 · U.S. census
- Kadi 334 · U.S. census
- Kadiri 227 · U.S. census
- Kadri 563 · U.S. census
When the index is not enough
This page says where Kaczor 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.