The Pio surname
In the 2010 U.S. Census, 1,252 people carried this name — #21,009 among all U.S. surnames, about 1 in every 238,100 people counted. That is up 19% from 1,056 in 2000.
In Argentina’s national register
At least 441 people named Pio 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 101 people named Pio.
29 of them were born outside France. Those born in France came from 14 départements, most often Bouches-du-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
63 people named Pio live in Switzerland.
They live in 7 of Switzerland’s 26 cantons, most of all in Valais.
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
35 people named Pio 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.
Who carried it
People named Pio,
with a public archive behind them.
-
Louis Pio 1841–1894 · politician -
Teodoro Pio d. 1561 · Catholic priest
-
Matteo Pio d. 1276 · Catholic priest
-
Manfredo Pio d. 1255 · Catholic priest
-
Ascanio Pio di Savoia 1575–1649 · diplomat
-
Antonio Pio 1809–1871 · painter
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Pio.
- Pinson 7,362 · U.S. census
- Pinta 291 · U.S. census
- Pintado 1,273 · U.S. census
- Pinter 3,669 · U.S. census
- Pinto 21,366 · U.S. census
- Pintor 1,907 · U.S. census
- Pioch 239 · U.S. census
- Pioche 141 · U.S. census
- Pioli 321 · U.S. census
- Piombino 203 · U.S. census
- Pion 829 · U.S. census
- Piot 101 · U.S. census
When the index is not enough
This page says where Pio 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.