The Koziol surname
In the 2010 U.S. Census, 3,194 people carried this name — #10,090 among all U.S. surnames, about 1 in every 92,600 people counted. About the same as in 2000 (3,183).
Where the name comes from
The origin of the Koziol surname
From Polish Kozioł.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Koziol» (English), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In Poland’s population register
21,606 people named Koziol have a registered home in Poland.
Of the 23,846 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 146 people named Koziol.
54 of them were born outside France. Those born in France came from 24 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 80 people named Koziol 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 Koziol live in Switzerland.
They live in 4 of Switzerland’s 26 cantons, most of all in Geneva.
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 the Nordic population registers
46 people named Koziol is counted in Sweden.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.
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).
In print
Koziol in American newspapers,
1915–1917.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 2,068 pages in all carry the name.
Who carried it
People named Koziol,
with a public archive behind them.
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Heinrich Koziol 1834–1890 · classical philologist
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Piotr Kozioł 1898–1943
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Geoffrey Koziol 1900– · university teacher
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Hermann Koziol 1926–2011 · sculptor
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Mojzesz Koziol 1931–1940
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Mule Koziol 1935–1940
Wikidata (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Koziol.
- 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
- Koziel 801 · U.S. census
- Kozlowski 10,358 · U.S. census
- Kozma 1,294 · U.S. census
- Kracher 137 · U.S. census
- Kraemer 7,726 · U.S. census
- Krafft 1,211 · U.S. census
- Kraft 22,035 · U.S. census
When the index is not enough
This page says where Koziol 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.