Abstract:  Spatial decision making problems, such as site selection, require proper means to handle the multiple socio-economic factors while considering physical suitability conditions. Decision support techniques that have been traditionally employed lack the capability to take into account these aspects simultaneously. Similarly, GIS that have been recognized as useful decision support technology do not provide means to deal with multiple decision factors. With these issues in mind, this study developed a framework for integrating the strengths of GIS, expert systems and the AHP to incorporate the decisionmaker’s preferences on a range of factors in finding optimally suitable sites. This study illustrates how the integrated system can be applied to an industrial site selection problem.