The Mikolajczak surname
In the 2010 U.S. Census, 658 people carried this name — #34,427 among all U.S. surnames, about 1 in every 454,500 people counted. That is up 8% from 611 in 2000.
In Poland’s population register
10,783 people named Mikolajczak have a registered home in Poland.
Of the 11,871 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 Greater Poland.
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 303 people named Mikolajczak.
83 of them were born outside France. Those born in France came from 18 départements, most often Pas-de-Calais.
Where it concentrates, on the mapWhere 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 28 people named Mikolajczak 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 Limburg.
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.
Who carried it
People named Mikolajczak,
with a public archive behind them.
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Georgette Mikolajczak 1946– · politician
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Moïra Mikolajczak 1979– · psychologist
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Christian Mikolajczak 1981– · association football player
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Celina Mikolajczak 2000– · astronomer
Wikidata (CC0).
Nearby in the index
Surnames next to Mikolajczak.
- Miguel 10,861 · U.S. census
- Mihai 335 · U.S. census
- Mihajlovic 168 · U.S. census
- Mika 2,451 · U.S. census
- Mikaelian 482 · U.S. census
- Miklas 527 · U.S. census
- Mikolajczyk 1,166 · U.S. census
- Mikula 2,310 · U.S. census
- Mila 447 · U.S. census
- Milan 6,268 · U.S. census
- Milanese 574 · U.S. census
- Milani 1,416 · U.S. census
When the index is not enough
This page says where Mikolajczak 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.