Siaya County is one of the counties in the former Nyanza Province in the southwest part of Kenya. It is bordered by Busia County to the north, Kakamega County and Vihiga County's to the northeast and Kisumu County to the southeast. It shares a water border with Homa Bay County which is located south of Siaya County.
The total area of the county is approximately 2,496.1 km and has a population of 993183 people with 471,669 males, 521,496 females and 18 intersex as per the 2019 census report with a population density of 392.6 people/km2.
Siaya County has a birth rate of 62.2 per 1000 people and an infant mortality rate of 142 per 1000 live births.
WADADIA implements the Action on Fistula program in Siaya county through awareness creation, identification and referral for treatment and reintegration of fistula survivors.