The Orsini surname
In the 2010 U.S. Census, 3,055 people carried this name — #10,505 among all U.S. surnames, about 1 in every 96,200 people counted. That is up 3% from 2,953 in 2000.
Where the name comes from
The origin of the Orsini surname
Diminutive of Orsi.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Orsini» (Italian), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In France’s civil register
France’s register of deaths holds 1,660 people named Orsini.
159 of them were born outside France. Those born in France came from 60 départements, most often Corsica.
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 Argentina’s national register
At least 1,005 people named Orsini 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
127 people named Orsini live in Switzerland.
They live in 11 of Switzerland’s 26 cantons, most of all in Zurich.
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/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
In Belgium’s population register
At least 75 people named Orsini 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 Liège.
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.
In print
Orsini in American newspapers,
1858–1910.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 6,243 pages in all carry the name.
Who carried it
People named Orsini,
with a public archive behind them.
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Roberto Orsini d. 1476 · military personnel -
Aristóteles Orsini d. 1998 · astronomer
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Matteo Orsini d. 1322 · bishop
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Giordano Orsini d. 1400 · politician
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Rinaldo Orsini d. 1374 · Catholic priest
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Michele Orsini d. 1493 · Catholic priest
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Orsini.
- Orosco 8,313 · U.S. census
- Orozco 65,904 · U.S. census
- Ors 126 · U.S. census
- Orsatti 214 · U.S. census
- Orsetti 100 · U.S. census
- Orsi 1,100 · U.S. census
- Orso 1,142 · U.S. census
- Orta 7,820 · U.S. census
- Ortega 127,256 · U.S. census
- Ortel 320 · U.S. census
- Orth 6,345 · U.S. census
- Ortis 1,584 · U.S. census
When the index is not enough
This page says where Orsini 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.