Yussef E'tesami (Persian: یوسف اعتصامی; also known as E'tesam-al-Molk (اعتصام‌الملک), Mirza Yusuf E'tesami Ashtiani (میرزا یوسف اعتصامی آشتیانی)‎; 1874–1938),[1] was an Iranian journalist, politician, publisher, translator, and writer.

His father, Mīrzā Ebrāhīm Khan Mostawfī Eʿteṣām-al-Molk was from Ashtian and the head of finance of the Iranian province of Azerbaijan.

[3] As noted in the first issue, the purpose of Bahar was “to provide a … forum for various significant topics of scientific, literary, ethical, historical, and artistic interest to people of understanding, and to acquaint the public with valuable information.” Most of the journal's material was written or translated by Yussef E'tesami, and a large part devoted to Western culture.

To Edward Granville Browne (1928, 489) Bahar appeared "very modern and European in tone;" and in Encyclopaedia Iranica, Heshmat Moayyad points out its "liberal and humanistic" orientation.

He is the author also of a commentary in Arabic of Abolqassem al-Zamakhshari's Atwaq ad-Dahab, a three-volume catalog of manuscripts in the Majles Library.