The Caro surname
In the 2010 U.S. Census, 10,064 people carried this name — #3,545 among all U.S. surnames, about 1 in every 29,300 people counted. That is up 99% from 5,052 in 2000.
In Argentina’s national register
At least 21,804 people named Caro 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 France’s civil register
France’s register of deaths holds 1,994 people named Caro.
58 of them were born outside France. Those born in France came from 74 départements, most often Morbihan.
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 Switzerland’s population statistics
123 people named Caro live in Switzerland.
They live in 11 of Switzerland’s 26 cantons, most of all in Zurich.
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 Belgium’s population register
At least 84 people named Caro 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.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In print
Caro in American newspapers,
1896–1917.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 764,102 pages in all carry the name.
Who carried it
People named Caro,
with a public archive behind them.
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Annibale Caro 1507–1566 · writer -
Ana Caro de Mallén d. 1650 · writer
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Ana Caro de Mallén d. 1646 · writer
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Juan Caro d. 1683 · military personnel
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Joan Caro d. 1524
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Isaac Karo 1440–1535 · physician
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Caro.
- Carne 560 · U.S. census
- Carneiro 1,100 · U.S. census
- Carnevale 3,101 · U.S. census
- Carnevali 113 · U.S. census
- Carney 32,897 · U.S. census
- Carnot 134 · U.S. census
- Carol 1,436 · U.S. census
- Carole 190 · U.S. census
- Caroli 110 · U.S. census
- Carollo 2,336 · U.S. census
- Carolus 656 · U.S. census
- Caron 12,810 · U.S. census
When the index is not enough
This page says where Caro 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.