The landslide hazard is one of the major natural disasters in Thailand that has caused tremendous loss of lives and properties. Public awareness was significantly arisen when the severe flooding and landslide occurred in Kathun district, Nakhon Sithammarat Province, southern Thailand in 1988 where the worst hit was approximately 230 casualties in Ban Kathun Nua. Subsequent devastated landslides occurred in Ban Nam Kor and Ban Nam Chun areas in Petchabun Province. In Year 2006, there have been two major landslide events in Uttaradit and in Nan Provinces, northern Thailand in May and August respectively. A nationwide landslide hazard study and mapping project has been studied to determine landslide potential and affected areas, mitigation plan all over the country.