The Yiddish Wikipedia (Yiddish: יידיש-וויקיפעדיע) is the Yiddish-language version of Wikipedia. It was founded on 3 March 2004, and the first article was written on 28 November of that year.

The Yiddish Wikipedia has 15,661 articles as of April 2026. There are 60,363 registered users (including bots); 58 are active, including 3 administrators.

In accordance with the norms for the Yiddish language, it is written exclusively in Hebrew script with different Yiddish orthography including YIVO, Hasidic Yiddish and Daytshmerish.

In 2007, conflict among editors on the site, especially between editors who were mostly active on the Hebrew Wikipedia site, led to the proposed closure of the Yiddish Wikipedia. While the closure did not take place, continuing conflict between editors continue due to opposing interests of group members regarding shared and interrelated doctrines about Jewishness.

The Yiddish Wikipedia reached 6,000 articles on 8 March 2009. The 6,000th article is יהושע העשיל תאומים-פרענקל, a rabbi. The 7,000th article is חנינא סגן הכהנים, an article about the Hanina Segan ha-Kohanim created on 24 December 2009.

Combined, the different Hasidic groups form the largest Yiddish-speaking community in the world today. Therefore, many new articles are about Hasidic rabbis.

Other examples of the Yiddish Wikipedia's extensive coverage on Orthodox Judaism in general, and Hasidic Judaism in particular, are:

Additional Judaism-related goals of the Yiddish Wikipedia are to spread Judaism and to create a virtual Jewish community online.