5,798 people were registered with the surname MIKOŁAJCZAK (male) in the PESEL register on 20 January 2026.
Surname MIKOŁAJCZAK
People with the surname MIKOŁAJCZAK in the PESEL register on 20 January 2026: 5,798 men and 6,056 women. Most registered in: WIELKOPOLSKIE.
6 verified statements · 1 possible finding
male
5,798people in the PESEL register · 20 January 2026
about 1 in 3,656
Most registered in: WIELKOPOLSKIE (53.7%, 20 January 2026)
female
6,056people in the PESEL register · 20 January 2026
about 1 in 3,560
Most registered in: WIELKOPOLSKIE (54.2%, 20 January 2026)
Each 1-in-X is computed within its own dataset. The datasets are different sizes, so these two figures are not compared with each other.
01
How many people have this surname?
The PESEL register publishes two separate surname lists, male and female. We show each figure on its own and never add them up.
male
female
6,056 people were registered with the surname MIKOŁAJCZAK (female) in the PESEL register on 20 January 2026.
The male and female datasets are separate and are never summed.
02
How rare is this surname?
“1 in X” means that roughly one in every X people on this list has this surname. The bigger X, the rarer the name. The rank counts from the most common surname on the list.
male
about 1 in 3,656
1001k10k100k1M10M
← more commonrarer →
#316 rank on the surname list
About 1 in 3,656 people counted in the PESEL register (male) bore the surname MIKOŁAJCZAK on 20 January 2026.
MIKOŁAJCZAK (male) ranked 316 among the surnames in this dataset.
female
about 1 in 3,560
1001k10k100k1M10M
← more commonrarer →
#303 rank on the surname list
About 1 in 3,560 people counted in the PESEL register (female) bore the surname MIKOŁAJCZAK on 20 January 2026.
MIKOŁAJCZAK (female) ranked 303 among the surnames in this dataset.
- #301GIL6,095
- #302KRZYŻANOWSKA6,094
- #303MIKOŁAJCZAK this surname6,056
- #304CICHOCKA6,053
- #305TOKARSKA6,039
Two places above and two below on the same list. Surnames with the same count share a place.
03
Where is it most often registered?
The map and the list show the voivodeships where people with this surname have a registered permanent address. The brighter the colour and the longer the bar, the bigger the share.
male
Among the 5,217 people with the surname MIKOŁAJCZAK (male) who had a registered voivodeship on 20 January 2026, 53.7% were registered in WIELKOPOLSKIE.
Hover over or tap a voivodeship to see its figures.
Share of people with a registered voivodeship, lowest first:
- 0%–15%
- 15%–30%
- 30%–45%
- 45%–60%
- 60%–75%
- not listed in the dataset — not zero
| Voivodeship | Share | Count |
|---|---|---|
| WIELKOPOLSKIE | 53.7% | 2,803 |
| KUJAWSKO-POMORSKIE | 12.7% | 664 |
| DOLNOŚLĄSKIE | 6.7% | 350 |
| LUBUSKIE | 4.5% | 235 |
| ZACHODNIOPOMORSKIE | 4.3% | 222 |
| ŚLĄSKIE | 4.2% | 219 |
| POMORSKIE | 3.6% | 189 |
| MAZOWIECKIE | 3.6% | 188 |
| LUBELSKIE | 1.3% | 69 |
| ŁÓDZKIE | 1.2% | 60 |
| PODKARPACKIE | 1.1% | 57 |
| MAŁOPOLSKIE | 1.1% | 56 |
| WARMIŃSKO-MAZURSKIE | 1.1% | 56 |
| OPOLSKIE | 0.5% | 27 |
| ŚWIĘTOKRZYSKIE | 0.2% | 13 |
| PODLASKIE | 0.2% | 9 |
female
Among the 5,561 people with the surname MIKOŁAJCZAK (female) who had a registered voivodeship on 20 January 2026, 54.2% were registered in WIELKOPOLSKIE.
Hover over or tap a voivodeship to see its figures.
Share of people with a registered voivodeship, lowest first:
- 0%–15%
- 15%–30%
- 30%–45%
- 45%–60%
- 60%–75%
- not listed in the dataset — not zero
| Voivodeship | Share | Count |
|---|---|---|
| WIELKOPOLSKIE | 54.2% | 3,013 |
| KUJAWSKO-POMORSKIE | 12.2% | 679 |
| DOLNOŚLĄSKIE | 6.8% | 376 |
| LUBUSKIE | 4.8% | 269 |
| ZACHODNIOPOMORSKIE | 4.5% | 249 |
| POMORSKIE | 3.9% | 218 |
| ŚLĄSKIE | 3.8% | 210 |
| MAZOWIECKIE | 3.6% | 201 |
| LUBELSKIE | 1.3% | 72 |
| ŁÓDZKIE | 1.2% | 69 |
| WARMIŃSKO-MAZURSKIE | 0.9% | 52 |
| PODKARPACKIE | 0.8% | 42 |
| MAŁOPOLSKIE | 0.7% | 40 |
| OPOLSKIE | 0.6% | 32 |
| ŚWIĘTOKRZYSKIE | 0.4% | 25 |
| PODLASKIE | 0.3% | 14 |
04
How did this count change between editions of the list?
The PESEL register publishes its lists every year. We show the number of people with this surname on each edition, beside how the whole list changed. We say what changed, not why.
male
The number of people with the surname MIKOŁAJCZAK (male) in the PESEL register changed from 5,991 on 30 June 2019 to 5,798 on 20 January 2026: −3.2%. The whole list changed by +6.7% between those editions.
| As of | Share of the list | People |
|---|---|---|
| 30 June 2019* | 1 in 3,315 | 5,991 |
| 22 January 2020 | 1 in 3,338 | 5,956 |
| 1 February 2021 | 1 in 3,377 | 5,919 |
| 27 January 2022 | 1 in 3,436 | 5,880 |
| 30 January 2023 | 1 in 3,556 | 5,852 |
| 19 January 2024 | 1 in 3,589 | 5,845 |
| 22 January 2025 | 1 in 3,625 | 5,820 |
| 20 January 2026 | 1 in 3,656 | 5,798 |
* The 2019 files describe their contents in fewer words than the later ones. We read them as the same list: people with their current surname.
female
The number of people with the surname MIKOŁAJCZAK (female) in the PESEL register changed from 6,277 on 30 June 2019 to 6,056 on 20 January 2026: −3.5%. The whole list changed by +6.5% between those editions.
| As of | Share of the list | People |
|---|---|---|
| 30 June 2019* | 1 in 3,226 | 6,277 |
| 22 January 2020 | 1 in 3,228 | 6,265 |
| 2 February 2021 | 1 in 3,253 | 6,230 |
| 27 January 2022 | The publisher's file dated 27 January 2022 repeats the data of the previous edition, so it is not shown as an edition of its own. | |
| 30 January 2023 | 1 in 3,477 | 6,146 |
| 19 January 2024 | 1 in 3,516 | 6,109 |
| 22 January 2025 | 1 in 3,530 | 6,100 |
| 20 January 2026 | 1 in 3,560 | 6,056 |
* The 2019 files describe their contents in fewer words than the later ones. We read them as the same list: people with their current surname.
05
What does this surname mean?
We give a meaning only when a scholarly work supports it. We don't guess.
This is a scholarly interpretation, not a measured value. Surname origins are often contested.
Mikołaj darował cały szereg nazwisk, jak: […] Mikołajczak
- Root
- Mikołaj
- Type
- other
06
Where does it appear in old print?
Polona, the National Library's digital library, searches its catalogue and the text of its scanned pages. We show how many results it returns for this word, and from which years.
The word MIKOŁAJCZAK appears on 11,111 pages of works not under copyright and in 647 catalogue records in Polona (searched on 1 October 2026).
These are search results for the word in any inflected form. Some may be another meaning of the same spelling, and they are not a count of people or of mentions of anyone's family.
- 1800–184952
- 1850–18991,050
- 1900–19181,297
- 1919–19395,806
- 1940 on2,881
Catalogue records by kind
- Periodicals163
- Articles35
- Books32
- E-books8
- Ephemera7
- Photographs2
Most common places of publication
- Poznań6,652
- Warszawa2,247
- Kraków212
- Hohensalza151
- Toruń140
- Bydgoszcz127
Example pages in the public domain
„MIKOŁAJCZAK Materjał — Woźniak; kapelusz — Płotka; bu ciki — Rybelski; pończochy i rękawiczki — Schulz”
„Jan 616, 243 Miklaszewski Ign. 2580, 230 Miklaszewski Jan 651, 238 Miklejewski Winc. 3182, 198 Mikołajczak”
„Mikołajczak Józef, uł. 17. p. uł. ph 3.VIII.1920, 25524.”
07
Who well known has this surname?
Wikidata, the open knowledge base behind Wikipedia, lists people with this surname. Polish citizens come first, and among them those the most Wikipedia articles are written about.
Wikidata lists 20 people with the surname MIKOŁAJCZAK who have a Wikipedia article (as of 4 October 2026).
Sharing a surname does not mean being related. Wikidata is edited by volunteers and can be wrong.
- Krzysztof Mikołajczakb. 1984Polish fencerWikipediaWikidata
- Aleksander Mikołajczakb. 1953Polish actorWikipediaWikidata
- Tomasz Mikołajczakb. 1987Polish footballerWikipediaWikidata
The other people (17) will be in the “Surname and family” report.
Sources on this page
- Official data Ministerstwo Cyfryzacji — Nazwiska występujące w rejestrze PESEL · 20 January 2026 · CC0 1.0 · Dane pochodzą z rejestru PESEL, Ministerstwo Cyfryzacji, dane.gov.pl (CC0 1.0) · dane.gov.pl
- Scholarly work ks. Józef Buryan — Skąd pochodzi twoje imię i nazwisko i nazwa miejscowości rodzinnej? (Zwięzły zarys imiennictwa polskiego) · 1933 · s. 9 (skan ZBC oai:zbc.uz.zgora.pl:82526, str. PDF 11)
- Digital library Biblioteka Narodowa — Polona · Polona, Biblioteka Narodowa · polona.pl
- Source Wikidata · CC0 · wikidata.org
How to read these figures
- Wykaz nazwisk męskich osób żyjących (wg pola nazwisko aktualne) występujących w rejestrze PESEL, stan na 20.01.2026
- Surnames occurring once are not published; absence from the dataset is not zero.
- The publisher does not state whether the split is by a person's sex or by the grammatical gender of the surname form. The datasets are therefore neither summed nor compared numerically.
- The male and female datasets are separate and are never summed.
- Wykaz nazwisk żeńskich osób żyjących (wg pola nazwisko aktualne) występujących w rejestrze PESEL, stan na 20.01.2026
- Denominator: 21,197,537 people counted in the PESEL register — the sum of the published counts in this dataset, not Poland's population.
- The 1-in-X figure is rounded; the count of people is exact.
- Denominator: 21,560,302 people counted in the PESEL register — the sum of the published counts in this dataset, not Poland's population.
- A permanent registered residence is an address in the register — not an actual address, and not information about a family's roots.
- Shares are of the people with a registered voivodeship, not of every bearer of the surname.
- The size of the list itself changes between editions, so beside the count we show the share of that edition's list (“1 in X”).
- This is a scholarly interpretation, not a measured value.
- Polona's figures are search results for the word in any inflected form, in the catalogue and in the text of pages of works not under copyright; not every result is the surname.
- The people from Wikidata share the surname; that does not mean they are related to each other or to anyone. No date of death in Wikidata does not mean a person is living.
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