The Sergio surname
In the 2010 U.S. Census, 822 people carried this name — #28,909 among all U.S. surnames, about 1 in every 357,100 people counted. That is up 7% from 771 in 2000.
In Argentina’s national register
At least 427 people named Sergio 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
98 people named Sergio 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 France’s civil register
France’s register of deaths holds 51 people named Sergio.
Most of them — 38 — were born outside France. Those born in France came from 6 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.
Nearby in the index
Surnames next to Sergio.
- Serey 181 · U.S. census
- Serfass 1,008 · U.S. census
- Serge 434 · U.S. census
- Sergeant 1,385 · U.S. census
- Sergent 2,957 · U.S. census
- Sergi 1,146 · U.S. census
- Seri 269 · U.S. census
- Serie 294 · U.S. census
- Serin 140 · U.S. census
- Serio 3,209 · U.S. census
- Serna 25,503 · U.S. census
- Sero 231 · U.S. census
When the index is not enough
This page says where Sergio 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.