Max Weinreich (1893 - 1969) was a linguist, specializing in Yiddish, and the father of the linguist Uriel Weinreich.

Weinreich founded the YIVO Institute for Jewish Research in Vilnius (Vilna) in 1925, and was its director from 1925 to 1939. From 1940 he led it in New York.

He completed HISTORY OF THE YIDDISH LANGUAGE, his magnum opus, shortly before his death.