75 Background: Patients with adverse pathologic features (≥pT3 disease or positive margins) at the time of radical prostatectomy (RP) have higher biochemical recurrence (BR). Adjuvant radiotherapy (ART) reduces BR, but has potential toxicities. Also, studies suggest Black men are more likely to have aggressive prostate cancer. Our objective was to identify whether black men undergoing RP are more likely to have adverse pathologic features (APF) that lead to an indication for ART. Methods: We conducted a retrospective cohort study of men with cT1-4 Nx/0 Mx/0 prostate adenocarcinoma in the National Cancer Database who underwent RP. Race was divided into 3 groups (Caucasian, Black, Other). Chi-square tests and analysis of variance (ANOVA) tests were used to compare clinical and socioeconomic covariates between race groups. Univariate (UVA) and multivariable analysis (MVA) were performed using logistic regression (LR) to identify covariates predicting for APF. LR was performed to identify the impact of race on pT3 disease and positive margins. Results: A total of 313,013 patients diagnosed between 2004-2014 and undergoing RP were included. 256,315 (85%) were Caucasian, 33,725 (11%) were Black, and 12,973 (4%) were Other race. Fewer Black men had Gleason group 1 (33% vs. 41%) but more had Gleason group 2 disease (46% vs. 38%, p < 0.001). Black men more frequently had PSA ≥10 ng/ml (18% vs. 16%, p < 0.001) and ≥cT2b disease (18% vs. 14%, p < 0.001). On UVA, Black men were more likely to have APF (Odds Ratio [OR] 1.18; 95% Confidence Interval [CI] 1.15-1.21; [p < 0.001]). On MVA, black race was independently associated with having APF (OR 1.21; 95% CI 1.18-1.24; p < 0.001). Black men were more likely to have positive margins (OR 1.26; 95% CI 1.22-1.29; p < 0.001) but less likely to have ≥pT3 disease (OR 0.77; 95% CI 0.74-0.79; p < 0.001). Conclusions: Independent of socioeconomic and clinical factors, Black men undergoing RP are more likely to have APF, increasing the risk of BR in this group, and more frequently creating an indication for ART. This appears to be more due to positive margins than locally advanced tumor. The underlying cause of this disparity warrants further exploration.