The Lecocq surname
In the 2010 U.S. Census, 267 people carried this name — #72,771 among all U.S. surnames, about 1 in every 1,111,100 people counted. That is up 10% from 242 in 2000.
In France’s civil register
France’s register of deaths holds 4,528 people named Lecocq.
95 of them were born outside France. Those born in France came from 81 départements, most often Pas-de-Calais.
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 1,848 people named Lecocq 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
65 people named Lecocq live in Switzerland.
They live in 4 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.
Who carried it
People named Lecocq,
with a public archive behind them.
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Francisco Lecocq 1790–1882 · businessperson -
Francisco Lecocq 1795–1882 · businessperson
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Charles Lecocq 1832–1918 · composer -
Charles Lecocq 1832–1918 · composer -
Pascal Le Coq 1567–1632 · physician
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Bernardo Lecocq 1734–1820 · military personnel
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Lecocq.
- Leclair 8,162 · U.S. census
- Leclaire 2,778 · U.S. census
- Leclerc 3,014 · U.S. census
- Leclercq 497 · U.S. census
- Leclere 588 · U.S. census
- Lecloux 156 · U.S. census
- Lecompte 3,120 · U.S. census
- Lecomte 775 · U.S. census
- Leconte 833 · U.S. census
- Lecoq 292 · U.S. census
- Lecornu 124 · U.S. census
- Lecour 267 · U.S. census
When the index is not enough
This page says where Lecocq 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.