Abstract: In public sector, information is considered as the most important resource. Information Communication Technologies (ICTs) have been used long time ago to enhance the government research. Thus, in order to have better advantages of ICT in public organization processes, organizations have to share and integrate their information. Electronic Information Sharing (EIS) among public organizations is the ability of public organizations to obtain, apply and process information in society with citizens. However, the most important barrier in EIS is the technical. One of EIS technical problems is public organizations store their information in Different Databases (DB). This study suggests using Data Warehouses (DW) instead of traditional databases in public organization. Moreover, it contributes to utilize data warehouse as of the EIS factors. Finally, it accordingly investigates the usefulness of data warehouses in enhancing EIS among agencies in public organization.