The Delfosse surname
In the 2010 U.S. Census, 591 people carried this name — #37,646 among all U.S. surnames, about 1 in every 500,000 people counted. That is up 18% from 500 in 2000.
In Belgium’s population register
At least 2,151 people named Delfosse 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 Hainaut.
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 1,580 people named Delfosse.
51 of them were born outside France. Those born in France came from 59 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
67 people named Delfosse live in Switzerland.
They live in 7 of Switzerland’s 26 cantons, most of all in Aargau.
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
Delfosse in American newspapers,
1878–1886.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 1,447 pages in all carry the name.
Nearby in the index
Surnames next to Delfosse.
- Delcourt 304 · U.S. census
- Delepine 108 · U.S. census
- Delery 224 · U.S. census
- Deley 199 · U.S. census
- Delfino 1,780 · U.S. census
- Delforge 141 · U.S. census
- Delgado 132,985 · U.S. census
- Delhomme 361 · U.S. census
- Delhotal 153 · U.S. census
- Delia 5,301 · U.S. census
- Delice 461 · U.S. census
- Delie 160 · U.S. census
When the index is not enough
This page says where Delfosse 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.