The Kwasniewski surname
In the 2010 U.S. Census, 723 people carried this name — #31,906 among all U.S. surnames, about 1 in every 400,000 people counted. That is up 3% from 705 in 2000.
In Poland’s population register
8,813 people named Kwasniewski have a registered home in Poland.
Of the 9,775 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 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 87 people named Kwasniewski.
19 of them were born outside France. Those born in France came from 12 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.
In Argentina’s national register
At least 37 people named Kwasniewski 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 the Nordic population registers
27 people named Kwasniewski 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).
Who carried it
People named Kwasniewski,
with a public archive behind them.
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Zikmund Kvasnievski 1921–1940
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Klaus Kwasniewski 1940– · association football player
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Peter Kwasniewski 1971– · author
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Dylan Kwasniewski 1995– · athlete
Wikidata (CC0).
Nearby in the index
Surnames next to Kwasniewski.
- Kuster 1,963 · U.S. census
- Kusz 271 · U.S. census
- Kuta 1,212 · U.S. census
- Kutter 445 · U.S. census
- Kuttler 292 · U.S. census
- Kuzma 2,588 · U.S. census
- Kwasnik 550 · U.S. census
- Kwiatek 564 · U.S. census
- Kwiatkowski 6,377 · U.S. census
- Kwiecien 529 · U.S. census
- Ky 1,042 · U.S. census
- La 6,655 · U.S. census
When the index is not enough
This page says where Kwasniewski 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.