The relationship between inflammatory bowel disease (IBD) and depression is complicated. The effect of depression on ulcerative colitis (UC) and Crohn's disease (CD) among the inpatient US population has not previously been studied. We retrospectively analyzed patients admitted with UC and CD from 2016 to 2019 using the National Inpatient Sample database. Our primary outcome was the effect of depression on hospital length of stay (LOS), costs, and mortality. Secondary outcomes included the comparison between UC and CD cases. In the UC population, 13.4% had depression, compared to 14.9% in the CD population. LOS was longer in UC and CD patients with depression (P < 0.001). Subgroup analysis revealed that LOS was longer in CD patients than UC patients in the depressed cohort (P < 0.001). Inpatient hospital costs were lower in IBD patients with depression (P < 0.001). Subgroup analysis revealed that hospital cost was $17,974 higher in CD patients than UC patients (P < 0.001). Depression did not increase mortality in the IBD population but increased LOS, with a greater impact on CD than UC. White women were found to have an increased prevalence of depression in the IBD population.