Trans-Nzoia County is a county in the former Rift Valley province, Kenya, located between the Nzoia River and Mt Elgon, 380 km northwest of Nairobi. At its centre is the town of Kitale which is the capital and largest town.The county borders Bungoma to the west, Uasin Gishu and Kakamega to the south, Elgeyo Marakwet to the east, Westpokot to the north and the republic of Uganda to the Northwest.
Trans Nzoia covers an area of 2495.5 square kilometres with a population of 990,341 people with 489107 males, 534115 females and 28 being intersex according to census 2019 report. The County covers an area of 2495.5 square kilometres with a population density of 396.9 per square kilometre.
There are about 78 health institutions in Trans Nzoia County - 1 County Referral Hospital, 4 Sub-county Hospitals and 33 Dispensaries. The county has 7 health centers, 28 medical clinics and about 6 nursing homes. The County has a total of 170117 households provided services by community health volunteers with an infant mortality rate of 63 deaths per 1000 live births. The under 5 mortality rate is at 97 deaths per 1000 live births.
WADADIA implements the Action on Fistula program in this county providing fistula treatment. The County also host Cherenganyi Nursing Home which one of the fistula treatment centres under the Action on Fistula program.