<p>One characteristic of borderline personality disorder (BPD) is impulsivity. Previous research has established overall trait impulsivity is associated with binge eating behavior, although this relationship has not been examined in individuals with BPD. This study aims to clarify whether changes in state impulsivity can predict the occurrence of binge eating episodes in those with BPD traits. We also sought to clarify the relationship between specific facets of impulsivity with binge eating in BPD.&#xa0;The current study used three independently assessed samples. Fifty-five undergraduate college students reporting frequent binge episodes, 53 undergraduate students with self-reported difficulties with emotion regulation, and 79 community dwelling adults, all of whom endorsed clinically significant traits of BPD, completed the SUPPS-P to measure trait impulsivity. Participants completed up to six surveys per day for approximately two weeks to assess binge eating and state impulsivity.&#xa0;Higher overall trait impulsivity, specifically trait negative urgency, trait lack of premeditation, and trait positive urgency, significantly predicted an increased number of binge episodes during the assessment period. Increases in state impulsivity, specifically negative urgency and lack of premeditation predicted binge eating episodes. Additionally, decreases in sensation seeking and positive urgency significantly predicted occurrence of a binge eating episode.&#xa0;Results of this study demonstrate the importance of exploring facets of impulsivity at the state level as well as the trait level. Findings suggest changes in state levels of impulsivity provide more nuance about what leads to binge eating in BPD and when such changes occur.</p>