Alam Shah (r. 1445 – 1451) was the fourth and last ruler of the Sayyid dynasty which ruled the Delhi Sultanate. Born Ala al-Din, he succeeded his father, Muhammad Shah to the throne and took on the regnal name of Alam Shah ("world king"). According to a 16th-century wit, by this time the Delhi Sultanate only extended from Delhi to the nearby suburb of Palam.
Alam Shah was an incapable ruler who abandoned his charge in 1448 and retired to Budaun. Three years later, Bahlul Lodi, who had made two prior attempts at capturing Delhi, took control of the capital to mark the beginning of the Lodi dynasty.