Rajkot is the fourth-largest city in the state of Gujarat, India, after Ahmedabad, Surat and Vadodara. Rajkot is the centre of the Saurashtra region of Gujarat. Rajkot is the 35th-largest urban agglomeration in India, with a population more than 1.2 million as of 2015. Rajkot is the eighteenth-cleanest city of India, and is the 22nd-fastest-growing city in the world.