Because of the holistic capability of Enterprise Architecture (EA) governments of developed countries have promoted EA adoption to improve coherency in their e-Government programs. Yet, there are very few systematic reviews on the value it delivers to their e-Government. Using the UN global e-Government development index, this paper investigates whether EA is affecting the main variable used in the e-Government development index. In investigating EA in developed countries qualitative evaluation is used. Government websites and relevant publicly available articles are the sources of information for this evaluation. The presence of EA seems to have a positive impact on e-Government. Thus it can be perceived that EA is valuable for the development of e-Government. It has the potential to improve interoperability within and among government agencies.