In Egypt, there is a power crisis. So search on varieties of power sources, especially in the highly consumed energy industries like cement is going in. Hence, Egypt began using coal as an energy source instead of Mazeot and Natural Gas. However, coal combustion emits large amounts of air pollutants as mercury (Hg), sulfur content, carbon content and organic materials. The aim of the present study was to assess mercury emissions from coal burning cement industry at various cement companies that use different types of coal. This study was a descriptive cross-sectional survey that was conducted in Tourah, Helwan, and Arabian Cement Production settings that use coal as an energy source. Stack sampling of both vapor, and particulates' Hg was conducted according to the standard isokinetic method. Total stack Hg was then calculated. Helwan Cement plant (Coal) was of the highest Hg emissions [0.0008(0.011) mg/m3] followed by Tourah that uses petroleum coke [0.006(0.011) mg/m3] and Arabian (mixed coal) [0.003(0.006) mg/m3]. From the present study we concluded that Hg emissions of Helwan cement plant (petroleum coke) was higher than that of Tourah (Coal) and Arabian (mixed coal) ones. All plants were compliant with the Egyptian.