Abstract: Achieving the desired family size is not a difficult decision to make for a couple, female sterilization is not always the first choice of family planning to many couples. The purpose of study was to identify factors that determine the utilization of female sterilization among women aged 18-49 years in Mch/Fp Clinic, Tigoni sub-county hospital, In Kiambu County. Tigoni Sub-County statistics and trend shows the utilization of female sterilization is low compared to the other methods of contraception.