| Halime Sultan | |
|---|---|
 Sarcophagus of Halime Sultan (right) and her son Mahmud (left) | |
| Valide Sultan of the Ottoman Empire | |
| First tenure | 22 November 1617 – 26 February 1618 |
| Predecessor | Handan Sultan |
| Successor | Herself (1622) |
| Second tenure | 19 May 1622 – 10 September 1623 |
| Predecessor | Herself (1618) |
| Successor | Kösem Sultan |
| Born | c. 1570 Abkhazia, Ottoman Empire |
| Died | after 1623 Eski Saray, Beyazıt Square, Constantinople, Ottoman Empire |
| Burial | Şehzade Mahmud Mausoleum, Şehzade Mosque, Istanbul |
| Consort of | Mehmed III |
| Issue | Şehzade Mahmud Hatice Sultan Şah Sultan Mustafa I |
| Religion | Sunni Islam, previously Eastern Orthodox |
Halime Sultan (Ottoman Turkish: حلیمه سلطان, "the gentle one" or "the patient one", c. 1570 - after 1623) was a consort of Sultan Mehmed III, and the mother of Sultan Mustafa I. The first woman to be Valide Sultan twice and the only to be Valide twice of a same son. She had at least four children with Mehmed: two sons Şehzade Mahmud and Mustafa I, and two daughters, Hatice Sultan and Şah Sultan. She was de facto co-ruler as Valide Sultan from 22 November 1617 to 26 February 1618 and from 19 May 1622 to 10 September 1623, because her son was mentally instable. Halime was also one of the prominent figures during the era known as the Sultanate of Women.
Halime lived in the Ottoman empire as a courtier during the reign of six Sultans: Murad III, Mehmed III, Ahmed I, Mustafa I, Osman II, Murad IV.