The Olczak surname
In the 2000 U.S. Census, 394 people carried this name — #49,965 among all U.S. surnames, about 1 in every 666,700 people counted.
Free to read. No account, no sign-up.
In Poland’s population register
7,061 people named Olczak have a registered home in Poland.
Of the 7,729 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 Łódź.
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 50 people named Olczak.
17 of them were born outside France. Those born in France came from 12 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.
Nearby in the index
Surnames next to Olczak.
- Ohl 2,058 · U.S. census
- Ohlmann 336 · U.S. census
- Ohmer 716 · U.S. census
- Ojeda 15,780 · U.S. census
- Okonski 592 · U.S. census
- Olazabal 414 · U.S. census
- Olejniczak 1,195 · U.S. census
- Olejnik 601 · U.S. census
- Olek 257 · U.S. census
- Oles 1,472 · U.S. census
- Olier 168 · U.S. census
- Oliger 432 · U.S. census
When the index is not enough
This page says where Olczak 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.