The Lecoq surname
In the 2010 U.S. Census, 292 people carried this name — #67,519 among all U.S. surnames, about 1 in every 1,000,000 people counted. That is up 10% from 265 in 2000.
In France’s civil register
France’s register of deaths holds 5,889 people named Lecoq.
48 of them were born outside France. Those born in France came from 81 départements, most often Seine-Maritime.
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 481 people named Lecoq 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 Liège.
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
24 people named Lecoq live in Switzerland.
They live in 3 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/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
In the Nordic population registers
20 people named Lecoq is counted in Sweden.
Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.
Counted, by country
Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown).
Who carried it
People named Lecoq,
with a public archive behind them.
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Horace Lecoq de Boisbaudran 1802–1897 · teacher -
Félix Lecoq 1805–1880 · veterinarian -
Paul-Émile Lecoq de Boisbaudran 1836–1912 · scientist -
Paul-Émile Lecoq de Boisbaudran 1838–1912 · scientist
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Louis-Étienne Lecoq 1776–1839
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Louise-Octavie Lecoq 1792–1816
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Lecoq.
- Leclere 588 · U.S. census
- Lecloux 156 · U.S. census
- Lecocq 267 · U.S. census
- Lecompte 3,120 · U.S. census
- Lecomte 775 · U.S. census
- Leconte 833 · U.S. census
- Lecornu 124 · U.S. census
- Lecour 267 · U.S. census
- Lecourt 118 · U.S. census
- Lecroix 102 · U.S. census
- Lecuona 134 · U.S. census
- Lecureux 190 · U.S. census
When the index is not enough
This page says where Lecoq 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.