The Castel surname
In the 2000 U.S. Census, 619 people carried this name — #34,599 among all U.S. surnames, about 1 in every 434,800 people counted.
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In France’s civil register
France’s register of deaths holds 5,781 people named Castel.
141 of them were born outside France. Those born in France came from 92 départements, most often Finistère.
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 167 people named Castel 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.
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
32 people named Castel live in Switzerland.
They live in 4 of Switzerland’s 26 cantons, most of all in Vaud.
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 · names with fewer than 3 bearers in a canton are not published.
Nearby in the index
Surnames next to Castel.
- Castaldi 923 · U.S. census
- Castaldo 2,055 · U.S. census
- Castan 183 · U.S. census
- Castaner 174 · U.S. census
- Castanheira 191 · U.S. census
- Castano 4,739 · U.S. census
- Castelein 134 · U.S. census
- Castell 999 · U.S. census
- Castella 273 · U.S. census
- Castellan 264 · U.S. census
- Castellana 437 · U.S. census
- Castellani 751 · U.S. census
When the index is not enough
This page says where Castel 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.