The Demartin surname
In the 2010 U.S. Census, 470 people carried this name — #45,495 among all U.S. surnames, about 1 in every 625,000 people counted. That is up 9% from 433 in 2000.
In Argentina’s national register
At least 617 people named Demartin live in Argentina.
RENAPER only publishes a name in a province when more than ten people there share it, so the real number is higher. Most of them live in Entre Ríos.
Where it concentrates, on the mapWhere they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In France’s civil register
France’s register of deaths holds 137 people named Demartin.
3 of them were born outside France. Those born in France came from 19 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 Belgium’s population register
At least 84 people named Demartin 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 East Flanders.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
Nearby in the index
Surnames next to Demartin.
- Demare 281 · U.S. census
- Demarest 2,904 · U.S. census
- Demaret 112 · U.S. census
- Demaria 3,475 · U.S. census
- Demars 4,097 · U.S. census
- Demart 104 · U.S. census
- Demartini 1,691 · U.S. census
- Demary 685 · U.S. census
- Demas 1,499 · U.S. census
- Demasse 105 · U.S. census
- Dematteis 695 · U.S. census
- Demay 1,286 · U.S. census
When the index is not enough
This page says where Demartin 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.