Accounting plays a very crucial role in the management and success or failure of most organizations. As a system, automated information system records and processes data of transaction and events into useful information for use in planning, controlling and operation of businesses. Kenya is a growing economy, and the global pressure has forced it to embrace E-Governance practices. As a result, ways to improve their operations have been placed. This study aimed at establishing the effect of implementing Automated Information Systems (AIS) on the County Government’s operations. The County operations were classified in terms of transparency and record keeping as well as supervision while the AIS was operationalized in terms of the Zizi System, the County Pro System and the Integrated Financial Management Information System (IFMIS). This study employed complete enumeration survey method to collect data from all the twelve sub-counties in Kiambu, Kenya. The respondents were the IT managers, Financial Officers, and the Revenue Officers. Multiple regression was used to test the effect of AIS on the Kenya County Governments’ operation. The findings of this study indicate that implementing the Automated Information Systems had a significant positive effect on the county government’s operations.