This paper assessed the Livelihood Vulnerability Index (LVI) using IPCC framework approach and a modified approach to estimate climate change vulnerability in south-west coastal area of Bangladesh. Nine Upazillas (sub-districts) in the south west coastal community were considered for this study. The major component indices of LVI such as Socio-demographic profile, Livelihood strategies, Social network, Health, Food, Water, Natural disaster and climate variability were calculated based on the household survey data. The LVI based on IPCC approach (LVI-IPCC) in nine upazillas in southwest coastal region of Bangladesh were found within a range of -0.02 to + 0.04 (in the scale of -1 to +1). In the modified approach, the LVI for the nine study areas were found within a wide range from 0.253 to 0.544 (in a scale of 0 to 1).