The Castagna surname
In the 2000 U.S. Census, 1,930 people carried this name — #14,255 among all U.S. surnames, about 1 in every 138,900 people counted.
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In France’s civil register
France’s register of deaths holds 346 people named Castagna.
132 of them were born outside France. Those born in France came from 37 départements, most often Bouches-du-Rhône.
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
157 people named Castagna live in Switzerland.
They live in 13 of Switzerland’s 26 cantons, most of all in Zurich.
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 · names with fewer than 3 bearers in a canton are not published.
In Belgium’s population register
At least 59 people named Castagna 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 Hainaut.
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.
Nearby in the index
Surnames next to Castagna.
- Cassin 888 · U.S. census
- Cassinelli 469 · U.S. census
- Cassini 256 · U.S. census
- Casson 1,910 · U.S. census
- Cassuto 109 · U.S. census
- Casta 193 · U.S. census
- Castagne 100 · U.S. census
- Castagno 558 · U.S. census
- Castagnoli 117 · U.S. census
- Castaing 222 · U.S. census
- Castaldi 923 · U.S. census
- Castaldo 2,055 · U.S. census
When the index is not enough
This page says where Castagna 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.