Vladimir Davidovich Medem, né Grinberg (Latvian: Vladimirs Davidovics Medems, Russian: ???????? ????????? ?????; 30 July 1879 in Liepaja, Russian Empire – 9 January 1923 in New York City), was a Russian Jewish politician and ideologue of the Jewish Labour Bund.
The Medem library in Paris, the largest European Yiddish institution, bears his name.