The Olszewski surname
In the 2010 U.S. Census, 5,554 people carried this name — #6,164 among all U.S. surnames, about 1 in every 53,200 people counted. That is down 1% from 5,628 in 2000.
In Poland’s population register
42,260 people named Olszewski have a registered home in Poland.
Of the 46,952 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 157 people named Olszewski.
48 of them were born outside France. Those born in France came from 32 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 Belgium’s population register
At least 45 people named Olszewski 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 Brussels-Capital.
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 Argentina’s national register
At least 40 people named Olszewski 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
24 people named Olszewski live in Switzerland.
They live in 4 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 the Nordic population registers
90 people named Olszewski 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
Olszewski in American newspapers,
1892–1959.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 7,028 pages in all carry the name.
Who carried it
People named Olszewski,
with a public archive behind them.
-
Karol Olszewski 1846–1915 · physician -
Stanisław Olszewski 1852–1898 · inventor -
Stanisław Olszewski 1852–1939 · geologist -
Kajetan Olszewski 1858–1944 · military officer -
Franciszek Olszewski 1859–1918 · writer
Wikidata and Wikimedia Commons (CC0) · 189 lives in all are documented under this name.
Nearby in the index
Surnames next to Olszewski.
When the index is not enough
This page says where Olszewski 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.