In this research, site locations of marina-type maritime transportation infrastructure (MTI) in the Bodrum Peninsula were analyzed using the coastal vulnerability index (CVI) approach. For the calculation of CVI, six parameters; coastal slope, relief, relative sea level change, shoreline erosion/accretion, mean tide range, and mean wave height were used in accordance with the method. After the data collected from different data sources were transferred into a geo-database, basic geographical information systems analyses were applied (reclass, buffer, subset, slope, overlay, classify, count, map algebra, etc.). CVI results have been presented as maps and tabular values using a scale of 1 (Very Low) to 5 (Very High). Thus, the vulnerability level of the MTI site locations was determined. According to the determined results, it was founded that, Ortakent and Turgutreis were Very High (red-5); Yalıkavak, Milta and Kale MTIs are High (orange-4); Cruise Port, Gumbet and Bitez were found to have Moderate (yellow-3) CVI values. In this research, the CVI approach was applied by evaluating the physical site location characteristics of marina-type MTI, for the first time applied in the Bodrum Peninsula, where there is a high density of marina. For adaptation strategies for existing MTIs, more investigations should be realized from the functional, economic, social, and ecosystem points of view. From the managerial point of view, it can be said that small marinas or municipal berthing facilities with a state ownership model are advised to work together with other marinas in the region if they exist. The CVI-methodology should also utilize for the site selection of any type of maritime transportation infrastructure.