Keynote lectures presented at the 2014 Geo-Congress held in Atlanta Georgia February 23-26 2014. Sponsored by the Geo-Institute of ASCE. This Geotechnical Special Publication 235 Geo-Congress 2014 Keynote Lectures: Geo-Characterization and Modeling for Sustainability contains eight peer-reviewed keynote papers on cutting edge aspects of sustainability-related geotechnical issues. Topics include: advanced methods for site characterization geotechnical responses to environmental and climatic events unsaturated soil studies sustainable design and construction methods in infrastructure development These papers serve as important references and milestones for fast-moving and impactful aspects of geotechnical and geoenvironmental engineering and will be of interest to both practitioners and researchers.