Geotechnical engineering is a complex field that deals with various hazards that can impact soil, rock, and other geologic materials. In this regard, safe design and practice in geotechnical engineering require engineers to identify indicators of geotechnical hazards and minimize consequences in the decision-making, investigation, design, and construction phases. A geotechnical engineer can properly identify the hazards and understand the risks associated with a project and provide safe, cost-effective, and sustainable design solutions to address the risks. This special issue on Geotechnical Engineering Hazards features 16 papers that delve into different geotechnical hazards and their impact on the stability of both natural and human-made structures. These papers provide valuable insights into the behavior of geotechnical systems and propose new methods and models for analyzing and predicting geotechnical hazards.