The aim of this study was to examine the psychological impact of devastating natural flooding on Avoidant personality Disorder among the residents of flood prone area. A cross-sectional survey was used to investigate the psychological symptoms of AvPD associated with the aftermath of the flood amongst adults living in the affected communities. The sample consisted of 100 adults from flood prone area and 100 adults from non-flood prone area from cross-section of society, and from both sexes from East-North Districts (Koshi Commissionery) of North Bihar, out of which 87 were found suffering from AvPD, and 113 were those showing negligible symptoms of AvPd, aged between 22 to 35 years. Data had had been collected after two months of recession of devastating flood. Avoidant personality Disorder was measured through Chandana Lakshmi's (2011) Avoidant Personality Disorder Scale. Results indicated that poor female persons of flood prone areas had greater amount of Avoidant Personality Disorder compared to their counterpart rich and male sufferers, and those of non-flood prone areas. There should be provision and facilities for on the spot psychological counseling to the flood victims.