The Leder surname
In the 2010 U.S. Census, 1,231 people carried this name — #21,288 among all U.S. surnames, about 1 in every 238,100 people counted. About the same as in 2000 (1,237).
In Poland’s population register
345 people named Leder have a registered home in Poland.
Of the 432 in Poland’s national register, these are the ones with a permanent address on file. They live in 12 of Poland’s 16 voivodeships, most of all in Łódź.
Where it concentrates, on the mapWhere they live today
PESEL register, Ministry of Digital Affairs of Poland (dane.gov.pl) — CC0 · living people by voivodeship of permanent residence, 20 January 2026.
In Switzerland’s population statistics
313 people named Leder live in Switzerland.
They live in 13 of Switzerland’s 26 cantons, most of all in Aargau.
Where it concentrates, on the mapWhere 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 Argentina’s national register
At least 137 people named Leder 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 France’s civil register
France’s register of deaths holds 130 people named Leder.
32 of them were born outside France. Those born in France came from 19 départements, most often Moselle.
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 Leder.
- Lecuyer 1,378 · U.S. census
- Ledan 119 · U.S. census
- Leday 1,363 · U.S. census
- Ledda 345 · U.S. census
- Lede 113 · U.S. census
- Ledee 537 · U.S. census
- Lederer 2,710 · U.S. census
- Lederle 228 · U.S. census
- Ledermann 265 · U.S. census
- Ledesma 20,311 · U.S. census
- Ledet 4,725 · U.S. census
- Ledig 113 · U.S. census
When the index is not enough
This page says where Leder 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.