Negative urgency (NU: tendency to act rashly when distressed) is the facet of impulsive personality that has been most predictive of binge eating, but less is known about the relative role of positive urgency (PU: tendency to act rashly in response to positive emotions). In addition, most studies have exclusively focused on women and the examination of pathological eating outcomes, using a dimensional symptom approach, has been somewhat limited. This study aimed to replicate and extend upon prior work. We examined the extent to which NU and/or PU are uniquely associated with dysregulated eating, using a latent factor comprised of dimensional symptoms, and directly tested whether effects differ by sex. Two independent cross-sectional samples of women and men were used (Sample 1: Midwestern university, 437 females, 348 males; Sample 2: Southwestern university, 301 females, 236 males). NU and PU were assessed with the UPPS-P Impulsive Behavior Scale, and dysregulated eating symptoms (i.e., binge eating, loss of control eating, eating concerns) were assessed with well-validated self-report questionnaires. Although both NU and PU showed significant positive associations with dysregulated eating, NU showed the strongest unique relationship with dysregulated eating in both samples. The relative role of PU was weakened in Sample 1 and completely attenuated in Sample 2 once its shared variance with NU was accounted for. All results were similar in men and women. Overall, findings continue to suggest that NU is the form of impulsivity that is most relevant to dysregulated eating in both men and women.