The Janus surname
In the 2000 U.S. Census, 2,118 people carried this name — #13,220 among all U.S. surnames, about 1 in every 126,600 people counted.
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In Poland’s population register
10,848 people named Janus have a registered home in Poland.
Of the 11,987 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 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 239 people named Janus.
29 of them were born outside France. Those born in France came from 19 départements, most often Bas-Rhin.
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
26 people named Janus live in Switzerland.
They live in 4 of Switzerland’s 26 cantons, most of all in Zurich.
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 · names with fewer than 3 bearers in a canton are not published.
Nearby in the index
Surnames next to Janus.
- Jansen 16,036 · U.S. census
- Janson 3,865 · U.S. census
- Janssen 10,720 · U.S. census
- Janssens 522 · U.S. census
- Janton 133 · U.S. census
- Jantzen 1,557 · U.S. census
- Janusz 1,115 · U.S. census
- Janvier 961 · U.S. census
- Janvrin 432 · U.S. census
- Jany 229 · U.S. census
- Jaques 3,067 · U.S. census
- Jaquet 274 · U.S. census
When the index is not enough
This page says where Janus 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.