Candida albicans is a prevalent opportunistic fungal pathogen that typically resides as a commensal in multiple niches in the human body. C. albicans exhibits substantial phenotypic and genotypic diversity, driven by standard mutational events and genomic mechanisms such as loss of heterozygosity, aneuploidy, and a parasexual cycle. For the past 60 years, efforts have been made to characterize intrapopulation diversity to identify C. albicans relatedness groups. The methods used for strain delineation have transitioned from low-resolution phenotypic typing methods to more robust sequence-based approaches, including multilocus sequence typing (MLST) and, more recently, whole-genome sequencing (WGS). MLST provided the first widely adopted framework for phylogenetic classification, distinguishing genetically distinct clusters among C. albicans isolates. However, in recent years, WGS has offered improved resolution, revealing evidence of gene flow and recombination. These methodological advances have also enhanced our understanding of population structure and associated traits, including antifungal resistance and virulence. This review traces the development of methods used to characterize genetic phenotypic and diversity in C. albicans, outlines current common practices in describing its population structure, and highlights opportunities for greater consistency in how phylogenetic clusters are named and defined.