The Petro surname
In the 2010 U.S. Census, 5,777 people carried this name — #5,957 among all U.S. surnames, about 1 in every 51,000 people counted. That is down 1% from 5,840 in 2000.
In France’s civil register
France’s register of deaths holds 229 people named Petro.
17 of them were born outside France. Those born in France came from 21 départements, most often Guadeloupe.
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 71 people named Petro 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.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where 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
54 people named Petro live in Switzerland.
They live in 4 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 the Nordic population registers
41 people named Petro is counted in Finland.
Finland counts its citizens, at home or abroad.
Counted, by country
Digital and Population Data Services Agency (DVV), Finland, surname statistics, August 2026 — CC BY 4.0.
In print
Petro in American newspapers,
1855–1892.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 98,148 pages in all carry the name.
Who carried it
People named Petro,
with a public archive behind them.
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Igor Petro d. 2012 · architect
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Leonardo Petro 1901– · actor
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Joan Petro Amengual 1903–1988 · politician
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Steve Petro 1914–1994 · American football player
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Sylvester Petro 1917–2007 · legal scholar
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Josef Petro 1919–1945
Wikidata (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Petro.
- Petrelli 422 · U.S. census
- Petri 3,115 · U.S. census
- Petrilli 654 · U.S. census
- Petrillo 4,179 · U.S. census
- Petrini 878 · U.S. census
- Petris 207 · U.S. census
- Petrocchi 120 · U.S. census
- Petroff 2,018 · U.S. census
- Petron 431 · U.S. census
- Petrone 3,854 · U.S. census
- Petroni 327 · U.S. census
- Petronio 430 · U.S. census
When the index is not enough
This page says where Petro 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.