The Kosowski surname

In the 2000 U.S. Census, 546 people carried this name — #38,141 among all U.S. surnames, about 1 in every 500,000 people counted.

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In Poland’s population register

5,986 people named Kosowski have a registered home in Poland.

Of the 6,552 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 map

Where they live today

Masovian 1,217

Lesser Poland 1,216

Silesian 561

Lower Silesian 487

Lublin 380

Łódź 378

Holy Cross 334

Greater Poland 272

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 51 people named Kosowski.

10 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

Born outside France 10

Pas-de-Calais 14

Nord 7

Paris 7

Moselle 6

Marne 4

Ardennes 2

Meurthe-et-Moselle 1

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 Kosowski.

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