The Ongaro surname
In the 2010 U.S. Census, 262 people carried this name — #73,911 among all U.S. surnames, about 1 in every 1,111,100 people counted. That is up 30% from 201 in 2000.
In Argentina’s national register
At least 361 people named Ongaro 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 France’s civil register
France’s register of deaths holds 160 people named Ongaro.
63 of them were born outside France. Those born in France came from 26 départements, most often Rhône.
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.
In Switzerland’s population statistics
104 people named Ongaro live in Switzerland.
They live in 6 of Switzerland’s 26 cantons, most of all in Ticino.
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 23 people named Ongaro 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.
Nearby in the index
Surnames next to Ongaro.
- Omar 7,660 · U.S. census
- Omari 595 · U.S. census
- Omer 2,063 · U.S. census
- Oms 164 · U.S. census
- Ona 584 · U.S. census
- Ong 9,584 · U.S. census
- Onorato 1,913 · U.S. census
- Opfermann 110 · U.S. census
- Oppenheim 1,795 · U.S. census
- Oppermann 727 · U.S. census
- Orabona 195 · U.S. census
- Oran 476 · U.S. census
When the index is not enough
This page says where Ongaro 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.