E-government initiatives provide enormous volume of information via online content. As public information changes over time due to changes in laws and regulations, maintaining the currency and consistency of the web content becomes acutely important. Government agencies have to regularly evaluate the web content (WC) to ensure high quality of information available to the citizens, businesses and public administrators. Currently there exists no standardized approach for monitoring and maintaining WC. By analyzing the guidelines of three government organizations, the authors develop WC ontology for the systematic and formal representation of the concepts and functions in evaluating web content. An ontology-based evaluation tool is proposed that can be used to improve the quality of web content and efficiency of the evaluation process. The ontological approach holds promising features and benefits including information sharing, reducing time and paper work during evaluation, assuring more accurate results, and communicating evaluation results to knowledge engineers, public administrators, evaluators and decision makers associated with e-government initiatives.