The Louis surname
In the 2010 U.S. Census, 23,738 people carried this name — #1,510 among all U.S. surnames, about 1 in every 12,400 people counted. That is up 28% from 18,552 in 2000.
In France’s civil register
France’s register of deaths holds 13,156 people named Louis.
488 of them were born outside France. Those born in France came from 106 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 3,328 people named Louis 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
374 people named Louis live in Switzerland.
They live in 18 of Switzerland’s 26 cantons, most of all in St. Gallen.
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 Argentina’s national register
At least 122 people named Louis 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 City of Buenos Aires.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In the Nordic population registers
80 people named Louis 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).
In print
Louis in American newspapers,
1867–1911.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 7,194,106 pages in all carry the name.
Who carried it
People named Louis,
with a public archive behind them.
-
Frederick Louis 1619–1681 · count palatine
-
Antoine Louis 1723–1792 · physician -
Marie Emmanuelle Bayon Louis 1745–1825 · composer -
Joseph Dominique, baron Louis 1755–1837 · politician -
Thomas Louis 1758–1807 · naval officer
Wikidata and Wikimedia Commons (CC0) · 192 lives in all are documented under this name.
Nearby in the index
Surnames next to Louis.
- Loubier 327 · U.S. census
- Louchart 212 · U.S. census
- Loue 141 · U.S. census
- Louer 236 · U.S. census
- Louey 128 · U.S. census
- Louge 111 · U.S. census
- Louise 621 · U.S. census
- Louison 446 · U.S. census
- Loup 383 · U.S. census
- Loureiro 1,023 · U.S. census
- Lourenco 1,728 · U.S. census
- Loury 351 · U.S. census
When the index is not enough
This page says where Louis 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.