| Emetullah Sultan | |
| Birth Date: | 22 June 1701 |
| Birth Place: | Edirne Palace, Edirne, Ottoman Empire |
| Death Place: | Constantinople, Ottoman Empire (present day Istanbul, Turkey) |
| Burial Place: | New Mosque, Istanbul |
| Issue: | Hibetullah Hanımsultan |
| House: | Ottoman |
| House-Type: | Dynasty |
| Father: | Mustafa II |
| Mother: | Şehsuvar Sultan |
| Religion: | Sunni Islam |
Emetullah Sultan (Turkish, Ottoman (1500-1928);: امت الله سلطان, "servant of Allah"; 22 June 1701 – 19 April 1727), called also Ümmetullah Sultan or Heybetullah Sultan, was an Ottoman princess, daughter of Sultan Mustafa II and Şehsuvar Sultan, half-sister of Sultan Mahmud I and full-sister of Sultan Osman III.
Emetullah Sultan was born the 22 June 1701 in the Edirne Palace. Her father was the Ottoman Sultan Mustafa II, her mother one of his consorts, Şehsuvar Kadin. She had an older full brother, the future Osman III. Her name was given her in honor of her paternal grandmother, Emetullah Rabia Gülnuş Sultan.
After her father's deposition in 1703 when she was two years old, she settled in the Old Palace in Istanbul.
In 1720, her uncle Sultan Ahmed III arranged her marriage to Osman Pasha. Known by at least four different nicknames—Silâhdâr, Çerkes, Küçük, Sinek—Osman Pasha had risen from serving as a sword-bearer to her father, and had been previously married to her cousin Rukiye Sultan, who dead recently, a daughter of Fatma Emetullah Sultan, who in turn was a daughter of Sultan Mehmed IV and so a sister of her father. The marriage took place on 13 September 1720 in the Old Palace.
The two together had a daughter, Hibetullah Hanımsultan.
Emetullah was widowed at Osman Pasha's death in 1724.
Emetullah Sultan died on 19 April 1727, and was buried in the mausoleum of New Mosque, Istanbul.
By her marriage, Emetullah Sultan had a daughter: