The Kozlowski surname
In the 2010 U.S. Census, 10,358 people carried this name — #3,449 among all U.S. surnames, about 1 in every 28,500 people counted. About the same as in 2000 (10,363).
What the name means
The meaning of the Kozlowski surname
Borrowed from Polish Kozłowski; from kozioł ("goat").
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Kozlowski» (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
65,953 people named Kozlowski have a registered home in Poland.
Of the 73,476 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 423 people named Kozlowski.
122 of them were born outside France. Those born in France came from 44 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 Argentina’s national register
At least 372 people named Kozlowski 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.
Where it concentrates, on the mapWhere 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
82 people named Kozlowski live in Switzerland.
They live in 12 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 Belgium’s population register
At least 28 people named Kozlowski 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 Limburg.
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 the Nordic population registers
135 people named Kozlowski 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
Kozlowski in American newspapers,
1897–1962.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 8,521 pages in all carry the name.
Who carried it
People named Kozlowski,
with a public archive behind them.
-
Theodor Kozlowski 1824–1905 · surveyor -
Linda Kozlowski 1958– · actor -
Dave Koz 1963– · musician -
Marisa C. Kozlowski 1965– · researcher -
Glenda Kozlowski 1974– · journalist -
Justin Kozlowski 1811– · photographer
Wikidata and Wikimedia Commons (CC0) · 62 lives in all are documented under this name.
Nearby in the index
Surnames next to Kozlowski.
- 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
- Koziol 3,194 · 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
- Krahenbuhl 484 · U.S. census
When the index is not enough
This page says where Kozlowski 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.