Sira is a taluk of Tumkur district in the state of Karnataka, India.

Sira was politically and militarily an important region of south India prior to the British Raj.

Sira Province was ruled by the Bijapur Kings from 1638 to 1687.

In 1761, Haidar Ali whose father Sheikh Fateh Mohammed occupied an important position in the local Mughal Army declared his independence from the Mughal Empire and declared himself the 'Nawab' of the province.

He called himself 'Nawab Haider Ali Bahadur' but lost the province to the Marathas from 1766 until 1774 when his son Tipu Sultan, captured it for him.