Nyamira County is a county in the former Nyanza Province of Kenya. Formally a district, Nyamira was hived off Kisii District in 1989, and it shares a common boundary with what was known as Nyamira District. The main cash crops grown are bananas and tea. The county has a population of 605,576. Its capital and largest town is Nyamira, with an urban pop…Nyamira County is a county in the former Nyanza Province of Kenya. Formally a district, Nyamira was hived off Kisii District in 1989, and it shares a common boundary with what was known as Nyamira District. The main cash crops grown are bananas and tea. The county has a population of 605,576. Its capital and largest town is Nyamira, with an urban population of around 41,668 The county is also referred to as North Kisii.