Though small in comparison to neighbouring Kisii, Oyugis has recently registered fast growth especially since the creation of the district and increased use of the town by NGOs operating in the area and the Sondu Miriu hydroelectric power station.
Oyugis is located 20 kilometres north of Kisii town along the major A1 Highway. There is also an inter-county road (C26) connecting Oyugis to Kendu Bay while C18 road links Oyugis with Homa Bay Town via Rangwe.
Oyugis had a town council with a population of 52,433, of whom 9,084 are classified urban (1999 census ).
Oyugis area forms Kasipul Constituency (carved out of the previous Kasipul-Kabondo Constituency). It has five County Assembly wards: West Kamagak Ward, East Kamagak Ward, West Kasipul Ward, Central Kasipul Ward and South Kasipul Ward. Administratively, Oyugis is in Kasipul division which, together with Kabondo, form the Rachuonyo South District.
The town hosts several important academic institutions like the Agoro Sare High School and Oyugis Craft Training Center. Other notable institutions include Wire Secondary School, Nyabola Girls, Buoye Secondary School among others. It is also the home to one of the oldest primary schools in Kenya, Wire Primary School, established in 1912.
- Kenya National Bureau of Statistics: Population of local authorities