It is the furthest parish to the north of Kitui diocese, approximately 150km from Kitui town, and 58km from Mwingi town. From East to west of the parish is cross section of 70km; this is from Mugoo River in the East to Tana River to the west.
Bordering parishes are:- East: Kyuso Parish; South: Kamuw?ongo Parish; West: Ishiara Parish (In Embu Diocese); North: Materi Parish (In Meru Diocese)
Kimangao parish is the only parish in the entire diocese that serves two different ethnic communities; Kamba (majority) and Tharaka (minority). The Tharaka people are on the far west of the parish along River Tana. We have four outstations among Tharaka community. The priest says Mass in Kamba Language to Tharaka (who understand the language). The diocese has started translating Mass format into Tharaka language for convenience. However it will take translate the entire liturgy in to Tharaka Language.