The Janssens surname
In the 2010 U.S. Census, 557 people carried this name — #39,486 among all U.S. surnames, about 1 in every 526,300 people counted. That is up 7% from 522 in 2000.
In Belgium’s population register
At least 27,148 people named Janssens 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 Antwerp.
Where it concentrates, on the mapWhere they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In France’s civil register
France’s register of deaths holds 962 people named Janssens.
131 of them were born outside France. Those born in France came from 52 départements, most often Nord.
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 Switzerland’s population statistics
103 people named Janssens live in Switzerland.
They live in 13 of Switzerland’s 26 cantons, most of all in Vaud.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
In print
Janssens in American newspapers,
1882–1957.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 26,774 pages in all carry the name.
Who carried it
People named Janssens,
with a public archive behind them.
-
Abraham Janssens I 1575–1632 · painter -
Jan Willem Janssens 1762–1838 · politician -
Jean-François-Joseph Janssens 1801–1835 · composer -
Charles Janssens 1822–1887 · lawyer -
Louis Janssens-Smits 1832–1884 · politician
Wikidata and Wikimedia Commons (CC0) · 249 lives in all are documented under this name.
Nearby in the index
Surnames next to Janssens.
- Janny 134 · U.S. census
- Janowski 2,047 · U.S. census
- Jans 983 · U.S. census
- Jansen 16,596 · U.S. census
- Janson 3,930 · U.S. census
- Janssen 11,423 · U.S. census
- Janton 139 · U.S. census
- Jantzen 1,590 · U.S. census
- Janus 2,172 · U.S. census
- Janusz 1,117 · U.S. census
- Janvier 1,482 · U.S. census
- Janvrin 520 · U.S. census
When the index is not enough
This page says where Janssens 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.