The research areas of Semantic Web, Linked Data and Knowledge Graphs have received a lot of attention in academia and industry recently. Since its inception in 2001, the Semantic Web has aimed at enriching the existing Web with meta-data and processing methods, so as to provide Web-based systems with intelligent capabilities such as context-awareness and decision support. Over the years, the Semantic Web vision has been driving many community efforts which have invested a lot of resources in developing vocabularies and ontologies for annotating their resources semantically. Besides ontologies, rules have long been a central part of the Semantic Web framework and are available as one of its fundamental representation tools, with logic serving as a unifying foundation. Linked data is a related research area which studies how one can make RDF data available on the Web, and interconnect it with other data with the aim of increasing its value for everybody. Knowledge Graphs have been shown useful not only for Web search (as demonstrated by Google, Bing etc) but also in many application domains. Many advanced capabilities required by Semantic Web, Linked Data and Knowledge Graph application scenarios call for reasoning. Thus, a perspective centered on the reasoning techniques complementing other research efforts in this area is desirable. The Reasoning Web series of annual Summer Schools is devoted to this perspective, and gives insight into the Semantic Web, Linked Data, Knowledge Graph, Ontologies, Rules, and Logic. It was started in 2005 on behalf of the work package « Education and Training (ET) » of the Network of Excellence REWERSE, and since then it has been established as a major annual event in the above mentioned research areas. It is primarily intended for postgraduate (Ph.D. or M.Sc.) students, postdoctoral researchers, young researchers, and senior researchers wishing to learn about Reasoning on the Semantic Web and related issues. The 14th Reasoning Web Summer School will take place in Luxembourg on 22-26 September 2018.