This study aims to identify the reality of e-governance and digital maturity in government institutions in the Sultanate of Oman. This study also aims to measure the level of performance in government institutions in the Sultanate of Oman, to build an integrated theoretical framework around the main study components, which consists of e-governance as the first major component which is reflected in (participation, transparency, accountability and, openness). Digital maturity is the second component of the study, and it is reflected in (technological knowledge, technological techniques, organizational structures, visions, and perceptions . This study is an analytical descriptive study, conducted on Omani government institutions. The survey consists of managers, heads of sections and workers in IT departments and sections in each of: (Ministry of Transport, Communications and Information Technology, Ministry of Commerce, Industry and Investment Promotion, Royal Omani Police, Ministry of Higher Education and Scientific Research The study sample includes (261) employees, by using sample/survey method (google forms). One of the most important results of the study is the influence of e-governance in the performance of government institutions in Oman, which increases (participation, transparency, accountability and, openness in an institute). The study also shows presence and impact of digital maturity represented in (technological knowledge, technological techniques, organizational structures, visions, and perceptions). Among its most important recommendations is the need to establish an independent center that aims to formulate clear policies for e-governance, and to find clear evaluation indicators that measure the extent of the development of government services in the Sultanate and provide a systematic, scientific assessment of these services. The study shows a need in government institutions to adopt advanced techniques and algorithms in the analysis processes enhance business intelligence that supports decision-making and contributes to the application of governance standards in government institutions