The Masi surname
In the 2000 U.S. Census, 3,012 people carried this name — #9,885 among all U.S. surnames, about 1 in every 89,300 people counted.
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In France’s civil register
France’s register of deaths holds 227 people named Masi.
71 of them were born outside France. Those born in France came from 26 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
189 people named Masi live in Switzerland.
They live in 13 of Switzerland’s 26 cantons, most of all in Aargau.
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 25 people named Masi 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 Flemish Brabant.
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 Masi.
- Maschio 106 · U.S. census
- Mascia 1,038 · U.S. census
- Mascio 518 · U.S. census
- Mascolo 643 · U.S. census
- Masella 674 · U.S. census
- Maselli 1,395 · U.S. census
- Masia 153 · U.S. census
- Masiero 190 · U.S. census
- Masini 413 · U.S. census
- Masino 750 · U.S. census
- Maslanka 863 · U.S. census
- Maslin 459 · U.S. census
When the index is not enough
This page says where Masi 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.