Quality service delivery as defined by International Organization for Standardization (ISO) is a relative concept and in most cases where inherent characteristic of a service meets the requirements of a patient, the delivery can be rated as high in quality. In service industries like hospitals for example, the experience of patients plays a crucial role in rating, assessment, and ranking of quality of services offered in these facilities. In Kenya, like most developing countries in Africa, premature deaths and preventable diseases still inflict a high toll in communities. Inadequacy in access to basic health services is affecting distinct regions, areas, communities, and social groups in these countries. The objective of the study was to establish the extent to which poor infrastructure affects healthcare service delivery in Tiaty sub-County. A descriptive survey research design was used for this study. The target population of the study was the employees and patients who visit the healthcare institutions in Tiaty sub-County. The study used a stratified random sampling technique to select a sample of 126 respondents. The questionnaire was the selected research instrument for the study. Quantitative data collected was analyzed by the use of descriptive statistics using SPSS (Version 21) and presented through percentages, means, standard deviations and frequencies. The study concludes that road networks, power coverage, healthcare facilities, and water and telecommunication, positively affect the healthcare service delivery in Tiaty sub-County. The study recommends that the government ensure the construction of roads in every sub-county in the country to increase the road networks and promote the distribution of power. Keyword: Infrastructure, Healthcare Service Delivery, Road Networks, Power Coverage, Healthcare Facilities, Water and Telecommunication and Healthcare Service Delivery