Sahib I Giray (1501–1551) was Khan of Kazan for three years and Khan of Crimea for nineteen years. His father was the Crimean Khan Meñli I Giray. Sahib was placed on the throne of Kazan by his ambitious brother Mehmed of Crimea and driven out of Kazan by the Russians. He became Khan of Crimea with Ottoman support and was expelled by the Turks for disobedience. During his reign Crimean troops fought for the Turks and also fought in the North Caucasus. In 1532-1584, during the long reigns of Sahib I Giray, Devlet I Giray and Mehmed II Giray, Crimea was at the height of its power.

Sahib's grandfather was the founder of the Giray dynasty, Hacı I Giray (c. 1441–1466). His father was Mengli Giray (1478–1515). His brothers included Mehmed I Giray (1515–1523), Saadet I Giray (1524–1532) and Mubarak (also spelled Mubarek).

The khanate of Kazan was unstable and usually alternated between pro- and anti-Russian khans. By custom, khans had to be descendants of Genghis, which Sahib indeed was. After the death of Mohammad Amin (1502–19) the anti-Russian faction wanted to bring Sahib from Crimea, but the Russians imposed their vassal Shahgali (1519–1521) instead. In the spring of 1521, at the request of the anti-Russian faction, Sahib entered Kazan and Shahgali fled to Muscovy.

To return to Crimea, the ambitious Mehmed of Crimea had now placed his brother on the throne of Kazan. The next step was to take the Khanate of Astrakhan, which he did in 1523. The Nogais feared Mehmed's growing power and killed him. Crimea passed to Mehmed’s son Gazi, who was quickly replaced by Mehmed’s and Sahib’s brother Saadet I Giray (1524–1532). Saadet was more cautious than his brother Mehmed, wanted to consolidate his rule in Crimea and gave little support to his brother in Kazan.

Hoping to return to Kazan, in the summer of 1521 khans Mehmed of Crimea and Sahib of Kazan made a joint raid on Muscovy. Sahib raided Nizhny Novgorod and Vladimir, joined his brother Mehmed and raided the outskirts of Moscow. They took a huge number of captives and returned to their khanates.

In the autumn of 1522 Sahib raided eastern Muscovy. In August–September 1523 Moscow sent a force down the Volga under their ally Shahgali, plundering villages along the river before reaching Kazan and turning back. In September Russia founded the fort of Vasilsursk. In October Sahib raided Galich and returned with many prisoners.

Sahib sent an ambassador to Saadat, the new khan of Crimea, asking for cannon, muskets (?пищали) and Janissaries but Saadet refused. In the spring of 1524 Sahib declared himself an Ottoman vassal, but this did not help. In the spring of 1524 Moscow sent a huge army under Ivan Belsky against Kazan and Sahib fled. He was replaced by Safa Giray of Kazan, said to be the son of Sahib's brother Fetikh.

In the summer of 1524 Sahib reached Crimea, where Saadet imprisoned him. In autumn he was released and assisted Saadet against their rebellious nephew İslâm I Giray. In 1525–26 and 1528–1530 he was Saadet’s Kalga. In 1531 Sahib helped defeat the Shirin clan. Howorth (1880^[1]) recorded that Sahib made a pilgrimage to Mecca and in 1532 accompanied Sulieman in a war in Hungary.

In May 1532 Saadet I Giray voluntarily renounced the position of khan and left for Istanbul. İslâm I Giray returned to Crimea and was proclaimed khan. The Ottoman Sultan did not recognize him and in the fall appointed Sahib as Crimean khan. He arrived with Turkish troops and was recognized by the Crimean nobles. İslâm, after a five-month reign, became Sahib's Kalga and was given possession of Perekop and Ochakiv. In the spring of 1534 İslâm revolted. He was repulsed from Crimea and fortified himself in Perekop. Saadet’s son Akhmed was made Kalga, but was killed in 1537 on Sahib’s order. Sahib’s son Emin then became Kalga. In 1537 Sahib drove İslâm out of Perekop. He fled to the Nogais and was killed by Baki-Beg, the Karachi Beg of the Mangit clan.

In terms of domestic policy, Sahib founded the new capital of Bakhchisarai 2 km downstream from the old capital of Salachik (prior to this, the nearby cliff-fort of Chufut-Kale and before that Stary Krym had served as capitals). Sahib expanded the harbor of Gozlev/Yevpatoria, giving the khanate its own port. He tried to weaken the great nobles by bringing their leaders to court and elevating the lesser nobles, and tried to sedentarize the Nogais.

When Sahib went to war he was accompanied by a guard of musketeers, wagons and field artillery. The main force was tribal cavalry.

In 1538 Sahib joined forces with Suleiman the Magnificent to fight the Moldavian ruler Petru Rareș, resulting in the Ottoman occupation of Ochakov and the separation of the Budjak coast from Moldavia.

In 1539 Sahib marched to the Taman peninsula to punish the Circassians for their attacks on Muslims. Kansavuk, the leader of the Zhaney tribe, bought him off with gifts to the Khan, Sultan and Turkish governor of Kaffa. A search in the mountains for the guilty parties failed. On the way back the Crimeans looted some Circassian villages.

In the winter of 1539/40 Sahib and his son Emin raided Lithuania and possibly Muscovy. The campaign was successful, but the returning troops suffered much from the cold.

In 1541 Sahib and Emin raided Muscovy. The runaway Prince Semyon Belsky promised to show them a ford over the Oka River, but they were late due to quarrels between Sahib and Baki-Beg. The Russians blocked the river bank with artillery and the Crimeans went home, taking a little loot.

In 1542 Sahib and Emin returned to the North Caucasus because Kansavuk had not fulfilled his promises, including the delivery of slaves. They entered the mountains, were attacked at night, were victorious, and returned with much loot.

1544 the Kabardian Prince Elbozady arrived in Crimea asking for help against his rebellious subjects. The Tatars marched east, defeated a night attack by the Kabardians and returned with many captives.

In 1545 Astrakhan was captured and Yamghurchi of Astrakhan was driven out.

In 1546 10000 Nogais under Ali-Mirza attacked Crimea to avenge the capture of Astrakhan. The Crimeans surrounded them near Perekop and utterly defeated them by blasting them with artillery and musket fire. After the battle Sahib ordered many of the prisoners executed.

Some time before 1551 Sahib had requested that his nephew Devlet (Devlet I Giray) be sent from Istanbul so that he could be made khan of Kazan. In reality, Sahib was trying to gain control of a potential rival. In 1551 Suleiman the Magnificent ordered Sahib to march against Persia. This was much further east than the Crimeans had ever gone. Sahib replied that his warriors were poorly equipped and could not withstand a long march. The sultan began to doubt the loyalty of his vassal and decided to replace him with Devlet. Sahib was told that Devlet was appointed Khan of Kazan^[2] and that Sahib should march against the Zhaney tribe of Circassians who had revolted and were attacking pilgrims returning from Mecca.

Before leaving, Sahib sent a large force under Emin, his son and Kalga, to Perekop to guard against an attack while his army was away. Sahib crossed to the Taman Peninsula, chased the culprits into the mountains, won a battle and took a large amount of loot and captives. Meanwhile Devlet arrived by land at Akkerman with 1000 Janissaries and 60 cannon. He took ship to Gozlev (Evpatoria), marched southeast and captured Bakhchiserai. When Emin learned of this he marched south but only got to the Alma River (it flows west to the sea between Evpatoria and Sevastopol). His whole army crossed over to Devlet's side and Emin was killed. When word of the coup reached Sahib he was abandoned by his army. He was imprisoned in the fortress of Taman and killed by his great nephew Bulyuk Giray under orders from Devlet. All of Sahib’s children and grandchildren were killed by order of Devlet. Devlet had Sahib buried with honors at Salachik near Bakhchisarai. Devlet I Giray (1551–1577) then became khan. When Devlet's successor was ordered to fight the Persians he went.

In the 2011–2014 TV series Muhteşem Yüzyıl he is portrayed by Mesut Özkeçeci. In the series he is the brother of Hafsa Sultan, and father of Aybige Hatun (who in real life was daughter of Mehmed I Giray)