The Mroczkowski surname
In the 2000 U.S. Census, 647 people carried this name — #33,292 among all U.S. surnames, about 1 in every 416,700 people counted.
Free to read. No account, no sign-up.
In Poland’s population register
7,029 people named Mroczkowski have a registered home in Poland.
Of the 7,749 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 54 people named Mroczkowski.
17 of them were born outside France. Those born in France came from 7 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 Mroczkowski.
- Moyer 36,421 · U.S. census
- Moyet 261 · U.S. census
- Moynier 127 · U.S. census
- Moyse 357 · U.S. census
- Moze 129 · U.S. census
- Mozer 483 · U.S. census
- Mrowka 297 · U.S. census
- Mroz 2,846 · U.S. census
- Mrozek 1,526 · U.S. census
- Mucci 2,258 · U.S. census
- Mucha 2,619 · U.S. census
- Muck 2,078 · U.S. census
When the index is not enough
This page says where Mroczkowski 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.