Abstract: One of the basic requirements of a healthy urbanization is compliance with the geological environment.During the urban planning stage this requirement is very often neglected and it still maintains itself as the mainissue of the agenda only when the problems arise. A typical example of this may be seen in the city of Samsun.Dense and widespread urbanization, which shows itself as a natural consequence of an increase in population, forcedthis coastal town to expand southward by climbing uphills. This southward climb, which was accomplished in spiteof adverse geological environmental conditions, has now started to reveal its consequences. Today, the majorityof the town is under the threat of landslides.Major factors which contribute to landsliding include the slope geometry, rock type, condition of rock, andgroundwater. Thus, detailed geological, morphological, hydrogeological, and geotechnical studies were conductedin the study area. In addition to these, the degree of damage on the existing structures has been determined in order to investigate the soil-structure interaction phenomena. Such investigations provided the basis for the microzonation of Samsun metropolitan area.