This data was obtained from the Livestock Registering Federation (LRF) with the permision of the individual breeders society. The aim of this study was to utilize phenotypic and genotypic data to characterize the genetic status of three South African composite beef breeds (Braford, Santa Gertrudis, and Simbra) in comparison to their selected founder breeds which are Brahman and Simmentaler. PopReport and R studio were used to analyse phenotypic data and PLINK version 1.90 was used to analyse genotypic data.