Introduction: Studies examining hypertension (HTN) among women of reproductive age (18-44 years) are sparse. We sought to evaluate HTN awareness, diagnosis, treatment, and social determinants of health among women aged 18-44 years, in a national registry. Methods: We analyzed cross-sectional data from participants enrolled in the American Heart Association Research Goes Red (RGR) Registry, an online platform powered by Verily, who responded to the Project Baseline and RGR enrollment questionnaires. HTN outcomes were examined as self-report awareness of blood pressure (yes/no), HTN diagnosis (yes/no), and current HTN medication use (yes/no). Multinomial logistic regression models were used to assess the association between HTN cascade outcomes and social determinants of health, adjusting for age. Results: In a sample of 2,422 adult women (mean age 36 ± 6 years); non-Hispanic Black women were 3-times more likely have HTN (adjusted Odds ratio [aOR] 3.08; 95%CI 1.67-5.66) and be treated (aOR 3.21; 95%CI 1.67-6.03) compared to non-Hispanic White women ( Table ). The odds of HTN prevalence were higher (aOR 1.82; 95%CI 1.11-2.94) and HTN awareness lower (aOR 0.62; 95%CI 0.39-0.98) among Hispanic women compared to non-Hispanic White women. Compared to college graduates, high school graduates had 43% lower odds of HTN awareness, 85% high odds of HTN diagnoses. Persons with lower income were more likely to have HTN diagnoses and treatment and less likely to be aware. Conclusions: Social determinants of health including race, education and income were associated with HTN cascade outcomes. Tailored public health interventions and policies for improving HTN outcomes among women of reproductive age must address social needs.