The Lacroix surname
In the 2010 U.S. Census, 8,003 people carried this name — #4,436 among all U.S. surnames, about 1 in every 36,900 people counted. That is up 5% from 7,606 in 2000.
What the name means
The meaning of the Lacroix surname
From French Lacroix, from la (“the”) + croix (“cross”).
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Lacroix» (English), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In France’s civil register
France’s register of deaths holds 16,295 people named Lacroix.
296 of them were born outside France. Those born in France came from 104 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 2,571 people named Lacroix 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 Argentina’s national register
At least 303 people named Lacroix 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 Switzerland’s population statistics
278 people named Lacroix live in Switzerland.
They live in 9 of Switzerland’s 26 cantons, most of all in Vaud.
Where it concentrates, on the mapWhere 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 Poland’s population register
60 people named Lacroix have a registered home in Poland.
Of the 98 in Poland’s national register, these are the ones with a permanent address on file. They live in 8 of Poland’s 16 voivodeships, most of all in Lubusz.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
PESEL register, Ministry of Digital Affairs of Poland (dane.gov.pl) — CC0 · living people by voivodeship of permanent residence, 20 January 2026.
In print
Lacroix in American newspapers,
1885–1920.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 26,415 pages in all carry the name.
Who carried it
People named Lacroix,
with a public archive behind them.
-
Antoine de Lacroix 1708–1781
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Emmanuel Lacroix 1753– · painter -
Sylvestre François Lacroix 1765–1843 · professor -
Alphonse François Lacroix 1799–1859 · missionary -
Paul Lacroix 1806–1884 · writer
Wikidata and Wikimedia Commons (CC0) · 204 lives in all are documented under this name.
Nearby in the index
Surnames next to Lacroix.
- Lacosse 479 · U.S. census
- Lacoste 2,430 · U.S. census
- Lacour 3,822 · U.S. census
- Lacourt 365 · U.S. census
- Lacouture 479 · U.S. census
- Lacquement 189 · U.S. census
- Lacrosse 1,090 · U.S. census
- Lada 963 · U.S. census
- Laden 740 · U.S. census
- Ladenburger 150 · U.S. census
- Ladner 6,551 · U.S. census
- Ladouceur 1,289 · U.S. census
When the index is not enough
This page says where Lacroix 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.