This study investigated the relationship between distress disclosure and posttraumatic stress disorder (PTSD) among flood victims in Awe Local Government Area (LGA) of Nasarawa State, Nigeria. Anchored on Pennebaker's disclosure theory and Ehlers and Clark's cognitive model of PTSD, the study adopted a cross-sectional survey design. A sample of 379 flood victims, comprising 168 (44.3%) males and 211 (55.7%) females, was drawn from eight flood-affected communities in Awe LGA using random sampling. Data were collected using the Distress Disclosure Index (DDI; Kahn & Hessling, 2001) and the Harvard Trauma Questionnaire (HTQ; Mollica et al., 1992), and analysed using Pearson Product Moment Correlation and independent-samples t-test. Results showed a statistically significant positive relationship between distress disclosure and PTSD [r(378) = .762, p < .01], indicating that flood victims who disclosed their distress more readily also reported higher levels of PTSD symptomatology, a pattern that runs counter to the buffering effect reported in much of the disclosure literature. Gender differences in PTSD were not statistically significant [t(378) = .842, p > .05], although female victims reported a slightly higher mean PTSD score than males. The findings are discussed in light of the collective and shared nature of flood trauma, the possible absence of therapeutic responsiveness in informal disclosure, and cultural patterns of communal grieving in the study area. The study recommends structured, professionally facilitated disclosure and psychosocial support programmes for flood-affected communities, alongside government-led risk-management and mental health interventions.