The Trojanowski surname
In the 2010 U.S. Census, 924 people carried this name — #26,422 among all U.S. surnames, about 1 in every 322,600 people counted. That is up 1% from 911 in 2000.
In Poland’s population register
9,399 people named Trojanowski have a registered home in Poland.
Of the 10,389 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 57 people named Trojanowski.
14 of them were born outside France. Those born in France came from 12 départements, most often Nord.
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.
In the Nordic population registers
22 people named Trojanowski is counted in Sweden.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.
Counted, by country
Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown).
Who carried it
People named Trojanowski,
with a public archive behind them.
-
Wincenty Trojanowski 1859–1928 · artist -
Edward Trojanowski 1873–1930 · painter -
Sylwester Trojanowski 1891–1940 · military officer -
Jerzy Trojanowski 1893–2000 · military officer -
Wojciech Trojanowski 1904–1988 · sports journalist -
Trojanowski d. 1945
Wikidata and Wikimedia Commons (CC0).
Nearby in the index
Surnames next to Trojanowski.
- Troesch 269 · U.S. census
- Troester 747 · U.S. census
- Trog 105 · U.S. census
- Troia 1,305 · U.S. census
- Troisi 972 · U.S. census
- Trojan 1,230 · U.S. census
- Trombetta 1,665 · U.S. census
- Tromp 519 · U.S. census
- Trompeter 479 · U.S. census
- Tron 261 · U.S. census
- Troncin 128 · U.S. census
- Trost 3,948 · U.S. census
When the index is not enough
This page says where Trojanowski 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.