The Castiglioni surname
In the 2010 U.S. Census, 143 people carried this name — #120,901 among all U.S. surnames, about 1 in every 2,000,000 people counted. That is down 46% from 266 in 2000.
In Argentina’s national register
At least 1,686 people named Castiglioni 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
170 people named Castiglioni live in Switzerland.
They live in 14 of Switzerland’s 26 cantons, most of all in Ticino.
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 94 people named Castiglioni.
16 of them were born outside France. Those born in France came from 26 départements, most often Bouches-du-Rhône.
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.
In print
Castiglioni in American newspapers,
1904–1951.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 478 pages in all carry the name.
Who carried it
People named Castiglioni,
with a public archive behind them.
-
Branda da Castiglione 1350–1443 · judge -
Francesco Abbondio Castiglioni 1523–1568 · Catholic priest -
Teresa Ciceri Castiglioni 1750–1821 · inventor -
Luigi Castiglioni 1757–1832 · historian -
Pius VIII 1761–1830 · Catholic bishop
Wikidata and Wikimedia Commons (CC0) · 91 lives in all are documented under this name.
Nearby in the index
Surnames next to Castiglioni.
- Castellon 8,041 · U.S. census
- Castells 164 · U.S. census
- Castellucci 671 · U.S. census
- Caster 3,208 · U.S. census
- Castiglia 1,010 · U.S. census
- Castiglione 2,139 · U.S. census
- Castilla 2,071 · U.S. census
- Castille 2,821 · U.S. census
- Castillo 230,420 · U.S. census
- Castillon 1,657 · U.S. census
- Castin 203 · U.S. census
- Castor 6,063 · U.S. census
When the index is not enough
This page says where Castiglioni 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.