As the range of human uses and demands on the world's oceans and coasts diversifies, there is a growing need for a sustainable relationship between human society and the marine environment. In its most basic form, geoinformation is digital, spatially referenced data and it has an important role to play in developing effective coastal management strategies to meet this need. Arising from the 12th CoastGIS symposium (Cape Town, April 2015), Geoinformatics for Marine and Coastal Management is an edited collection of contributions from a range of coastal practitioners, professionals, student, and researchers. It has 16 chapters, including 14 international case studies, written by 38 coastal scientists. To consolidate material from so many different people and countries under the broad focal area of marine and coastal geoinformatics requires close editorial guidance, driven by a clear overarching vision of how the many facets of coastal geoinformation come together to make a coherent whole. The editors have done a good job of meeting this requirement.