Aleksander Ossypovich Zederbaum (Yiddish: אַלעקסאַנדער הלוי אָסיפאָוויטש צעדערבוים; August 27, 1816, Zamość – September 8, 1893, Saint Petersburg) was a Polish-Russian Jewish journalist who wrote primarily in Hebrew.

After an existence of eight years the latter paper was suppressed by the government, whereupon Zederbaum went to Saint Petersburg, obtaining permission to transfer the headquarters of Ha-Melitz to that city.

He was also granted permission to do his own printing, and to publish, besides Ha-Melitz, a Russian weekly (Vyestnik Ruskich Yedreed), which, however, enjoyed only a short existence, as did also the "Razsvyet," which he started a few years later.

In 1884 Zederbaum invited rising Yiddish author Mordecai Spector to join him as an assistant editor of the paper, after publishing his breakthrough novel Der Yidisher Muzhik (The Jewish Farmer).

His Kol Mevasser offered an opportunity for many of the best jargon-writers to develop their talents; and among these may be mentioned Yitzkhok Yoel Linetzky, Mendele Mocher Sforim, Mordecai Spector, and Sholem Aleichem.