The Loureiro surname
In the 2010 U.S. Census, 1,023 people carried this name — #24,466 among all U.S. surnames, about 1 in every 285,700 people counted. That is up 33% from 767 in 2000.
In Argentina’s national register
At least 1,218 people named Loureiro 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
808 people named Loureiro live in Switzerland.
They live in 20 of Switzerland’s 26 cantons, most of all in Geneva.
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 France’s civil register
France’s register of deaths holds 121 people named Loureiro.
Most of them — 74 — were born outside France. Those born in France came from 21 départements, most often Jura.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
Who carried it
People named Loureiro,
with a public archive behind them.
-
Artur Loureiro 1853–1932 · painter -
José Loureiro 1880–1949 · businessperson -
Oswaldo Loureiro 1932–2018 · actor
-
Valentim Loureiro 1938– · military personnel -
Doc Comparato 1949– · screenwriter
Wikidata and Wikimedia Commons (CC0) · 92 lives in all are documented under this name.
Nearby in the index
Surnames next to Loureiro.
- Louey 128 · U.S. census
- Louge 111 · U.S. census
- Louis 23,738 · U.S. census
- Louise 621 · U.S. census
- Louison 446 · U.S. census
- Loup 383 · U.S. census
- Lourenco 1,728 · U.S. census
- Loury 351 · U.S. census
- Loustalot 140 · U.S. census
- Loustaunau 316 · U.S. census
- Lousteau 130 · U.S. census
- Louton 251 · U.S. census
When the index is not enough
This page says where Loureiro 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.