We describe the results from a study of 17 quantitative morphological variables for the characterization of the varieties forming the present Iberian Pig. The Analysis of Variance, the Canonical Discriminate Analysis and the Cluster analysis developed here have shown a different grade of differentiation amongst the studied varieties. We have found significantly different varieties as the Mahalanobis distances show, while other varieties are very close. This information was used to give a hypothesis about population structure of the Iberian Pig taking into account the quantitative morphological characteristics.