The Marcoux surname
In the 2010 U.S. Census, 2,507 people carried this name — #12,399 among all U.S. surnames, about 1 in every 117,600 people counted. That is up 1% from 2,488 in 2000.
In France’s civil register
France’s register of deaths holds 1,236 people named Marcoux.
19 of them were born outside France. Those born in France came from 61 départements, most often Loire.
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 Belgium’s population register
At least 144 people named Marcoux 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.
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.
In Argentina’s national register
At least 42 people named Marcoux 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 Tucumán.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
Nearby in the index
Surnames next to Marcoux.
- Marcone 305 · U.S. census
- Marconi 2,712 · U.S. census
- Marcos 5,052 · U.S. census
- Marcotte 5,923 · U.S. census
- Marcou 408 · U.S. census
- Marcouiller 134 · U.S. census
- Marcu 328 · U.S. census
- Marcucci 1,611 · U.S. census
- Marcuccilli 124 · U.S. census
- Marcus 17,671 · U.S. census
- Marcy 2,558 · U.S. census
- Marczak 747 · U.S. census
When the index is not enough
This page says where Marcoux 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.