Background: This study aimed to investigate the prevalence of prehypertension among individuals with diabetes mellitus and its association with various demographic and clinical factors. Hypertension is a common comorbidity in diabetes patients, and prehypertension may serve as an early warning sign, allowing for early intervention to prevent the development of full-blown hypertension. Materials and Methods: A cross-sectional study was conducted among a cohort of 200 individuals with diabetes mellitus, in DR.K.K.BM Subharti Hospital, G.B.C.M. over a period of one year. The participants' age, gender, duration of diabetes, body mass index (BMI), HbA1c levels, and family history of hypertension were recorded. Blood pressure measurements were taken according to the American Heart Association guidelines, and individuals were categorized into normotensive, prehypertensive, or hypertensive groups based on their blood pressure values. Results: The prevalence of prehypertension among individuals with diabetes mellitus was found to be 45.6%. Among the demographic and clinical factors studied, age (p < 0.001), BMI (p = 0.023), and family history of hypertension (p = 0.017) were significantly associated with prehypertension in diabetes patients. However, no significant association was observed between prehypertension and gender, duration of diabetes, or HbA1c levels. Conclusion: This study reveals a high prevalence of prehypertension in individuals with diabetes mellitus. Early identification of prehypertensive individuals and targeted interventions, such as lifestyle modifications and pharmacological therapy, may be crucial in preventing the progression to hypertension in this vulnerable population. Healthcare providers should pay special attention to older individuals, those with higher BMI, and those with a family history of hypertension in diabetes management. Regular blood pressure monitoring and timely interventions are essential to reduce the cardiovascular risk associated with prehypertension in diabetes patients.