The Marioni surname
In the 2010 U.S. Census, 278 people carried this name — #70,403 among all U.S. surnames, about 1 in every 1,111,100 people counted. That is up 5% from 264 in 2000.
In Argentina’s national register
At least 766 people named Marioni 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 Córdoba.
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
159 people named Marioni live in Switzerland.
They live in 8 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 · 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 Marioni.
42 of them were born outside France. Those born in France came from 8 départements, most often Paris.
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.
Nearby in the index
Surnames next to Marioni.
- Marinier 105 · U.S. census
- Marinkovic 297 · U.S. census
- Marino 31,687 · U.S. census
- Marinoni 104 · U.S. census
- Mario 711 · U.S. census
- Marion 14,777 · U.S. census
- Mariotti 1,229 · U.S. census
- Maris 1,986 · U.S. census
- Mariscal 8,368 · U.S. census
- Marit 106 · U.S. census
- Marius 417 · U.S. census
- Marjanovic 259 · U.S. census
When the index is not enough
This page says where Marioni 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.