Cowpea is one of the most important grain legume crops worldwide. Although Pseudocercospora cruenta on cowpea was first observed in Mexico in 1976, this is the first documented report of this pathogen in Mexico. The fungus was isolated from symptomatic cowpea leaves collected from Nayarit state, Mexico and identified on the basis of morphology and sequence analysis of the internal transcribed spacer (ITS). Pathogenicity was verified on cowpea plants.