The Porro surname
In the 2010 U.S. Census, 567 people carried this name — #38,902 among all U.S. surnames, about 1 in every 526,300 people counted. That is down 10% from 630 in 2000.
Where the name comes from
The origin of the Porro surname
Borrowed from Catalan, Italian, Portuguese and Spanish Porro.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Porro» (English), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In Argentina’s national register
At least 1,204 people named Porro 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 127 people named Porro.
37 of them were born outside France. Those born in France came from 25 départements, most often Alpes-Maritimes.
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
84 people named Porro 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 the Nordic population registers
20 people named Porro 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.
Nearby in the index
Surnames next to Porro.
- Porier 143 · U.S. census
- Porlier 133 · U.S. census
- Porras 12,106 · U.S. census
- Porraz 224 · U.S. census
- Porretta 355 · U.S. census
- Porrini 221 · U.S. census
- Port 2,800 · U.S. census
- Porta 1,461 · U.S. census
- Portal 1,100 · U.S. census
- Portales 1,578 · U.S. census
- Portas 171 · U.S. census
- Porte 744 · U.S. census
When the index is not enough
This page says where Porro 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.