Donanma Mecmuası is an Ottoman periodical published by Donanma-i Osmani Muavenet-i Milliye Cemiyeti with 191 issues between March 1326 (1910) and March 1335 (1919). It was published monthly between March 1326 and February 1329, weekly between June 1330 and Teşrin-i Evvel 1334, and monthly again between Kanun-ı Evvel 1334 and March 1335. Donanma Mecmuası covers Ottoman maritime history, education and training, culture, literature, art and morality. It is among the primary sources in terms of military and history.