High Quality Content by WIKIPEDIA articles! Sagana is a small town in Kirinyaga District, Central, Kenya. It is along the Nairobi-Nyeri highway, 100 kilometres north of Nairobi, the capital of Kenya. Its name comes from Kenyas longest river, Tana River which is also called Thagana. Kirinyaga District is an administrative district in the Central Province of Kenya. Its capital town is Kerugoya. The district has a population of 457,105 and an area of 1,478 km². Sagana is a small town in Kirinyaga District, Central, Kenya. It is along the Nairobi-Nyeri highway, 100 kilometres north of Nairobi, the capital of Kenya. Its name comes from Kenyas longest river, Tana River which is also called Thagana. Kirinyaga District is an administrative district in the Central Province of Kenya. Its capital town is Kerugoya. The district has a population of 457,105 and an area of 1,478 km².