Umerkot means the fort of Umer, remained the capital of Greater Sindh, which also included some parts of present day Rajasthan state of India. The town became prominent during the time of the Mughals and later the British Raj. The Mughal king Akbar was born in Umerkot when his father Humayun fled from military defeat at the hands of Sher Shah Suri. Rana Prasad, a Hindu Sodha Rajput ruler of Amarkot, gave refuge to Humayun.
A significant folklore story relating to Umerkot is that of Umar Marvi, a young girl abducted by Umer, then-ruler and believed be the funder of the Umerkot, who wanted to marry because of her beauty. Upon her refusal she was imprisoned in the historic Umerkot Fort for many years until her ultimate release. Because of her courage, Marvi is an idol for the local people of Umerkot.