Cognomen زنجانی (زنجانی 
) , throughout the world, is a very rare surname. The family name زنجانی is characteristic of Southern Asia, particularly Iran, where it is a very rare surname.
| شهاب‌الدین محمود بن احمد زنجانی Azeri-Iraqi faqih and judge, IR (b. 1177) |
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حاج میر بهاءالدین زنجانی IR (b. 1814) |
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میرزا ابوطالب زنجانی Iranian cleric, IR (b. 1843) |
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ابراهیم زنجانی Iranian Shia faqih and politician (1856-1934), IR (b. 1856) |
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| ملا محمدعلی زنجانی Babi leader, IR (b. 1812) |
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| قربان‌علی زنجانی IR (b. 1824) |
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عبدالکریم زنجانی Shiite philosopher, IR (b. 1887) |
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احمد نجفی زنجانی Iranian-Iraqi calligrapher and Shia cleric, IR (b. 1908) |
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| احمد مدرس زنجانی Iranian Twelver Shia cleric and poet, IR (b. 1861) |
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سید محمد عزالدین حسيني زنجانی Iranian grand ayatollah (1921-2013), IR (b. 1921) |
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سید اسماعیل موسوی زنجانی Iranian judge (1926-2002), IR (b. 1926) |
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سید موسی شبیری زنجانی Iranian grand ayatollah, IR (b. 1928) |
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عباسعلی عمید زنجانی Iranian ayatollah (1937-2011), IR (b. 1937) |
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| شیخ‌الاسلام زنجانی Iranian university teacher and writer (1892-1941), IR (b. 1891) |
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اسدالله بیات زنجانی Iranian grand ayatollah, IR (b. 1941) |
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