| Ismail Badruddin | |
| Native Name: | اِسمعِيل بَدرُالدّين |
| Honorific Suffix: | 38th Da'i al-Mutlaq of the Dawoodi Bohra |
| Image Upright: | 1.2 |
| Birth Date: | 1686 AD |
| Death Date: | 1738 AD |
| Death Place: | Jamnagar, India |
| Resting Place: | Jamnagar, India |
| Office1: | Da'i al-Mutlaq |
| Term Start1: | 1719 AD (1130 AH) |
| Term End1: | 1738 AD (1150 AH) |
| Predecessor1: | Noor Mohammad Nooruddin |
| Successor1: | Ibrahim Wajihuddin |
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| Father: | Syedi Sheikh Adam Safiyuddin |
| Religion: | Islam |
| Sect: | Isma'ili |
| Subsect: | Dawoodi Bohra |
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Syedna Ismail Badruddin (II) Bin Syedi Sheikh Adam (died on 7 Moharram 1150 H/1738 AD in Jamnagar, India) was the 38th Dā'ī of the Dawoodi Bohras. He succeeded the 37th Da'i Syedna Noor Mohammad Nooruddin to the religious post.
Syedna Badruddin became Da'i al-Mutlaq in 1130 AH/1719 AD.[1] His period of Da'wat was from 1130-1150 AH/ 1719-1738 AD for about 19 years and 6 months.
He was born in Udaipur in 1686 during the tenure of Syedna Abduttayyeb Zakiuddin II. His father Syedi Sheikh Adam Safiyuddin, brother of Syedna Musa Kalimuddin was a scholar and writer. Syedna Badruddin lost both his parents when he young. He married Syedna Musa Kalimuddin's daughter Jivana BaiSaheba who bore him one daughter. By his second marriage with Fatema AaiSaheba, he had two sons, Syedi AbdeMusa Kalimuddin and Syedna Abduttayyeb Zakiuddin III.