The Siwek surname
In the 2000 U.S. Census, 728 people carried this name — #30,324 among all U.S. surnames, about 1 in every 370,400 people counted.
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In Poland’s population register
11,063 people named Siwek have a registered home in Poland.
Of the 11,977 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 82 people named Siwek.
30 of them were born outside France. Those born in France came from 13 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 Siwek.
- Sitko 971 · U.S. census
- Sitter 1,095 · U.S. census
- Sitterle 113 · U.S. census
- Sittler 449 · U.S. census
- Sitz 1,117 · U.S. census
- Sivard 145 · U.S. census
- Six 3,541 · U.S. census
- Skalecki 238 · U.S. census
- Skalski 990 · U.S. census
- Skiba 2,713 · U.S. census
- Skoczylas 554 · U.S. census
- Skora 596 · U.S. census
When the index is not enough
This page says where Siwek 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.