Mwingi is a town in the Kitui County in the Eastern Region of the Republic of Kenya. It has an urban population of 15,970 (2009 census). The town is located along the A3 Road between Nairobi and Garissa, 47 kilometres (29 mi) north of its county capital Kitui, and 200 kilometres (120 mi) east of the capital city of Nairobi. It was the capital of the former Mwingi District.