The Delhi Sultanate or the Sultanate of Delhi was a late medieval empire primarily based in Delhi that stretched over large parts of the Indian subcontinent, for 320 years (1206–1526). Following the invasion of South Asia by the Ghurid dynasty, five dynasties ruled over the Delhi Sultanate sequentially: the Mamluk dynasty (1206–1290), the Khalji dynasty (1290–1320), the Tughlaq dynasty (1320–1414), the Sayyid dynasty (1414–1451), and the Lodi dynasty (1451–1526). It covered large swaths of territory in modern-day India, Pakistan, and Bangladesh as well as some parts of southern Nepal.

Medieval India refers to a long period of post-classical history of the Indian subcontinent between the "ancient period" and "modern period". It is usually regarded as running approximately from the breakup of the Gupta Empire in the 6th century CE to the start of the early modern period in 1526 with the start of the Mughal Empire, although some historians regard it as both starting and finishing later than these points. The medieval period is itself subdivided into the early medieval and late medieval eras.