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Kaolin is a commercial term used to describe white clay composed essentially of kaolinite with a general formula: Al4Si4O10(OH)8. Kaolins are distinguished from other clays by whiteness, and fine controllable particle size [1]. Kaolin consists of one tetrahedral silica sheet and one octahedral alumina sheet; it is an important industrial raw material having widespread applications in industries such as the manufacture of papers, paints, rubbers, ceramics, cosmetics, plastic and medicines [2-4]. The choice of kaolin for industrial applications is dependent on several factors including specific requirements for developing a particular technology [5]. Mineralogically and chemically, kaolin contains quartz as the major impurity and iron (in form of Fe2O3) and titania (in the form of anatase) as minor impurities [6-8]. The presence of impurities, particularly iron and titania bearing minerals, impacts color to kaolin (low brightness) and are detrimental in most kaolin applications. Most of the recent studies conducted on Djebel Debbagh kaolin deposit has focused on the understanding of thermal behavior of different phases and the use of this kaolin as a raw material for the refractory industry [9-15]. Contrarily to this, studies on the utilization as a raw material that can be used in the electrical insulator industry are rare. The DD1 kaolin has the highest properties (whiteness, brightness, purity), but DD2 and DD3 kaolins have lower properties and cannot be used in whiteware production due to their colors (grey and blackish, respectively). The objective of this study was to characterize three types of kaolin from Djebel Debbagh deposit (DD1, DD2 and DD3) in order to be used in electrical porcelain insulators as local raw material. The physical and chemical properties of kaolin are essential before considering it as a basic raw material in electrical insulators. To characterize Characterization of Algerian kaolins for utilization as a raw material in electrical insulators