The constant increasing use of the internet GIS in local government authorities implies that it is necessary to have in place a reliable mechanism for quality assurance of the sites. However, existing Web site evaluation models are primarily based on attributes relating to the non-spatial contents, and therefore are not adequate in evaluating a variety of Internet GIS sites in a systematic manner. This paper is intended to determine criteria for evaluating internet GIS sites of local government authorities. After carefully reviewing the previous literature of Government website evaluation, three criteria were identified: (1) contents (2) design (3) spatial navigation. An empirical study has been conducted to validate each of the three categories using two samples of internet GIS sites from Korea (Daegu) and USA (San Diego). A site diagnosis by the criteria allowed us to identify strength and weakness of the two sample sites. For example, overall operation strategies in the San Diego site were closely linked to the UIS (Urban Information System) while the Daegu site was not user-friendly to track required local government specific information since it is offered by initiative of the firm outsourcing the Web site. The organizations operating internet GIS sites may use the proposed criteria to evaluate their Web sites against those of others and to possibly make them more competitive. Future research will need to refine and expand specifically tailored to each of the different Web site categories.