Sira is a city and taluk headquarters of Sira Taluk of Tumkur district in the state of Karnataka, India. It lies on the AH 47, NH 48 (earlier NH 4). It is the second largest city in the district after the headquarters by population, area and economy. It is the fastest developing city in the district. The State Capital city, Bengaluru, is 120 km from Sira. It is known for its historical significance as a political and military center and for being the capital of Imperial Sira Subah in the early 1700s.

Sira is located at 13°45′N 76°55′E / 13.75°N 76.91°E / 13.75; 76.91. It has an average elevation of 662 metres (2171 feet).

As of 2011 India census, Sira had a population of 57,554. Males constitute 52% of the population and females 48%. The literacy rate of Sira city is 83.77%, which is higher than the state average of 75.36%. In Sira, male literacy is around 87.47% while female literacy is 79.99%. In Sira, 11.68% of the population is under 6 years of age.

• Chandra Arya, Canadian Liberal party politician

• Sira Taluk
• Province of Sira
• Tumkur
• Tumkur District
• Taluks of Karnataka
• Hagalavadi
• Ajjenahalli, Sira

• Sira city
• [1] Benjamin Rice, Lewis, Mysore: A Gazetteer Compiled for the Government, Volume I, Mysore In General, 1897a, Westminster: Archibald Constable and Company. Pp. xix, 834
• [2] Archaeological Survey of India, Bangalore circle, List showing protected monuments (For Sira, see Sl. No: 198 & 199)
• [3] Plea to protect fort in Sira (Story in Deccan Herald, Bangalore, 19 May 2008)