The Koscielniak surname

In the 2000 U.S. Census, 516 people carried this name — #40,019 among all U.S. surnames, about 1 in every 526,300 people counted.

See Koscielniak on the map Look up another surname

Free to read. No account, no sign-up.

In Poland’s population register

4,509 people named Koscielniak have a registered home in Poland.

Of the 4,941 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 Lesser Poland.

Where it concentrates, on the map

Where they live today

Lesser Poland 1,504

Silesian 744

Greater Poland 651

Masovian 395

Lower Silesian 290

Kuyavian-Pomeranian 163

Łódź 152

West Pomeranian 140

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 105 people named Koscielniak.

27 of them were born outside France. Those born in France came from 18 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 27

Pas-de-Calais 24

Nord 9

Loire 8

Somme 5

Gers 4

Lot-et-Garonne 4

Moselle 3

Meuse 3

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 Koscielniak.

When the index is not enough

This page says where Koscielniak 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.

See what a volume holds