The potential of e-government as a new public medium depends on the quality of web pages and the offered e-services. For this reason, the importance of measuring the performance of e-government initiatives cannot be overemphasized and assessing factors associated with website success are needed. A multi criteria decision making (MCDM) evaluation model that practitioners and researchers can use for assessing the quality of government websites is developed and validated in this paper. More precisely, an axiomatic design based decision making approach is adopted to evaluate government websites' quality. A case study focusing on Turkish government websites is also presented.