This study examined relationship aggression reporting concordance among 303 men with alcohol use disorders and their female partners enrolled in couples-based alcohol abuse treatment. Agreement for physical and psychological aggression was generally consistent with, or higher than, concordance rates reported among other populations. Men's antisocial personality disorder characteristics were the strongest predictor of higher concordance for male- and female-perpetrated aggression. Higher alcohol problem severity, poorer relationship adjustment, and higher psychopathic personality features were associated with better concordance in some analyses. Women reported experiencing more physical aggression than men reported perpetrating, and women reported perpetrating more psychological aggression than men reported experiencing. Findings highlight the importance of obtaining aggression reports from both partners and the need for research investigating methods for improving concordance. (Contains 4 tables and 7 notes.)