The Blois surname
In the 2010 U.S. Census, 230 people carried this name — #82,044 among all U.S. surnames, about 1 in every 1,250,000 people counted. That is down 16% from 275 in 2000.
In France’s civil register
France’s register of deaths holds 715 people named Blois.
8 of them were born outside France. Those born in France came from 47 départements, most often Dordogne.
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 Argentina’s national register
At least 274 people named Blois 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 Buenos Aires Province.
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 Belgium’s population register
At least 21 people named Blois 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.
Nearby in the index
Surnames next to Blois.
- Bleyer 264 · U.S. census
- Blier 428 · U.S. census
- Blind 835 · U.S. census
- Bloch 4,817 · U.S. census
- Blocher 1,733 · U.S. census
- Block 21,717 · U.S. census
- Blom 3,103 · U.S. census
- Blomme 296 · U.S. census
- Blon 128 · U.S. census
- Blond 248 · U.S. census
- Blonde 256 · U.S. census
- Blondeau 261 · U.S. census
When the index is not enough
This page says where Blois 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.