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Index/People/Sergio DellaPergola

Sergio DellaPergola

Israeli demographer

Fact-Checks

3 results
Nov 17, 2025
Most Viewed

How has the Jewish population changed worldwide over the last 100 years?

Worldwide Jewish numbers today are roughly 15.7–15.8 million, about 0.2% of the global population, with recent growth concentrated in Israel and relative stability or decline in many diaspora communit...

Jan 5, 2026

How do definitions of Jewish identity (religious, ethnic, cultural) affect population estimates?

Definitions of Jewish identity — religious (self-identification), halakhic/legal, ethnic/ancestral, and household or affinity-based — produce markedly different population totals because each rule eit...

Jan 1, 2026

What are the largest Jewish communities outside Israel and the U.S. in 2025?

As of 2025, after Israel and the United States, the largest Jewish communities are concentrated in a handful of Western countries—France, Canada, the United Kingdom, Germany and Argentina are consiste...

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