Olszak surname: U.S. census count, rank and records | FamilyCrests

The Olszak surname

In the 2010 U.S. Census, 242 people carried this name — #78,821 among all U.S. surnames, about 1 in every 1,250,000 people counted. That is up 6% from 229 in 2000.

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In Poland’s population register

5,090 people named Olszak have a registered home in Poland.

Of the 5,521 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 Lublin.

Where it concentrates, on the map

Where they live today

Lublin 918
Masovian 781
Greater Poland 542
Lesser Poland 494
Lower Silesian 388
Kuyavian-Pomeranian 291
Silesian 284
West Pomeranian 262

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 57 people named Olszak.

21 of them were born outside France. Those born in France came from 7 départements, most often Moselle.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they were born

Born outside France 21
Moselle 15
Nord 8
Pas-de-Calais 7
Seine-et-Marne 2
Vienne 2
Indre 1
Saône-et-Loire 1

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 41 people named Olszak 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 City of Buenos Aires.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they live today

City of Buenos Aires 28
Chaco 13

RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.

Who carried it

People named Olszak,
with a public archive behind them.

  • Wacław Olszak
    Wacław Olszak 1902–1980 · engineer
  • Wacław Olszak 1868–1939 · physician
  • Feliks Olszak 1904–1965 · engineer
  • Wiesław Olszak 1925–2018 · engineer
  • Gerd Olszak 1929–2004 · scientific assistent
  • Gerd Olszak 1929–2004 · scientific assistent

Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.

Nearby in the index

Surnames next to Olszak.

When the index is not enough

This page says where Olszak 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.

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