The aim of this thesis is to explore racial groups that are affected by gestational diabetes mellitus in the state of California. Hypothesis of the study to be tested are: 1. Women of minority race background are more likely than majority white women to report having gestational diabetes. 2. Women with lower household incomes, irrespective of race are more likely to report having gestational diabetes. Statistical analysis was conducted using SPSS 20 (statistical package for the social sciences). Descriptive analysis was used to examine the relationship between different race groups and their socioeconomic status. A One-Way ANOVA test was conducted to show the significance of low household income and gestational diabetes. The outcomes of this study indicate that gestational diabetes mellitus does exist within the subsamples of women who have lower socioeconomic status and are members of minority race groups.