Purpose: The study aimed to determine the influence of electronic procurement on the performance of county governments within Kenya’s Lake Region Economic Bloc (LREB). Specifically, it examined the effects of e-sourcing, e-ordering, e-payment, and e-invoicing on county government performance. Material/methods: The study was guided by the Transaction Cost Theory, Technology Acceptance Theory, Innovation Diffusion Theory, and Unified Theory of Acceptance and Use of Technology. It adopted a descriptive survey research design targeting 267 top and middle-level procurement/supply chain employees across 14 LREB counties. Using stratified and simple random sampling, 159 respondents were selected. Data collection involved structured questionnaires. Validity was assessed through construct validity, and reliability was measured using Cronbach’s Alpha. Descriptive statistics (means, standard deviations, frequencies, percentages) and inferential statistics (Pearson correlation, multiple regression) were used for data analysis and hypothesis testing. Findings: The study found that e-sourcing, e-ordering, e-payment, and e-invoicing each had a positive and statistically significant effect on county government performance. These findings suggest that e-procurement adoption contributes to improved transparency, efficiency, and accountability in public procurement processes. Conclusion: Despite progress in the implementation of e-procurement systems, challenges remain—particularly in digital capacity, staff training, and system integration. These gaps limit the full realization of e-procurement benefits in county governments. Value: The study highlights the importance of sustained investment in ICT infrastructure, capacity building, and policy enforcement. It also underscores the need for national oversight agencies to develop tailored support and monitoring frameworks to enhance procurement performance through digital transformation at the county level.