The Leblanc surname
In the 2000 U.S. Census, 40,923 people carried this name — #767 among all U.S. surnames, about 1 in every 6,590 people counted.
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In France’s civil register
France’s register of deaths holds 10,836 people named Leblanc.
159 of them were born outside France. Those born in France came from 96 départements, most often Paris.
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 805 people named Leblanc 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 Switzerland’s population statistics
58 people named Leblanc live in Switzerland.
They live in 7 of Switzerland’s 26 cantons, most of all in Vaud.
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.
Who carried it
People named Leblanc,
with a public archive behind them.
-
Nicolas Leblanc 1742–1806 · chemist -
Jean-Claude Leblanc de Beaulieu 1753–1825 · bishop -
Charles-André Leblanc 1816–1877 · lawyer -
Henri Leblanc 1825–1902 · writer -
Olivier J. Leblanc 1830–1919 · politician
Wikidata and Wikimedia Commons (CC0) · 242 lives in all are documented under this name.
Nearby in the index
Surnames next to Leblanc.
- Lebeaux 195 · U.S. census
- Lebegue 106 · U.S. census
- Lebel 2,310 · U.S. census
- Leber 2,665 · U.S. census
- Lebert 704 · U.S. census
- Lebeuf 127 · U.S. census
- Lebleu 905 · U.S. census
- Leblond 752 · U.S. census
- Leboeuf 3,419 · U.S. census
- Lebold 367 · U.S. census
- Lebon 594 · U.S. census
- Leborgne 165 · U.S. census
When the index is not enough
This page says where Leblanc 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.