The anodic oxides formed on lead under varying potential and pH were identified by x‐ray and electron diffraction. Pure lead specimens were anodized at selected constant potentials to develop anodic coatings of sufficient thickness to give strong x‐ray patterns. The domains of occurrence of: , yellow and red , and the intermediate oxides, , and were determined for acid and alkaline electrolytes. The intermediate oxides are not believed to be direct anodic oxides, but to represent chemical reaction products. The occurrence of certain of the oxides may be attributable to an initial electrochemical oxidation of water. The identifications have been presented in potential‐pH phase diagrams.