Mûkûrwe'inî was a former district in Nyeri County, Kenya. Mûkûrwe'inî was elevated from a division to district status in 2008. The old Mûkûrwe'inî Divisional boundaries remained as the new district's boundaries. Before Kenya's Independence in 1963, Mûkûrwe'inî was referred to as South Tetu Division. It was one of the seven new districts that were created out of the old Nyeri District of Central Province of Kenya. The district headquarters were located at Kiahungu Township which is also the commercial hub for Mûkûrwe'inî. In 2010, the district was merged with others to form Nyeri County.