ISW-LOD is a forum for the semantic web and linked open data communities, where practitioners in industry, academia and others interested in these topics are welcome for describing real and potential applications, share experience and discuss the latest scientific results and technology innovations around semantic technologies and linked open data. The Fourth International Semantic Web and Linked Open Data workshop (4th ISW-LOD 2016) took place on November 23 at San José, Costa Rica. This fourth edition was Co-located with IBERAMIA 2016 and we focused on presenting articles on Semantic Web, IoT and Linked Open Data. The goal of ISW-LOD is not only to create an interlinked web of knowledge on these topics in Mexico, but also to create an interlinked Iberoamerican community by networking with international and consolidated communities. In this sense we had a Panel Discussions: Towards a Thematic Network on Semantic Technologies with Héctor Gibrán Ceballos Cancino (ITESM, México) as chair and the followings participants: We would like to thank the members of the Technical Program Committee for their valuable reviews, which were essential for designing the program. We really appreciate their support and effort made to improve the revised paper. We also thank the organizers of IBERAMIA 2016, specifically Federico Barber (Spain), Francisco Garijo (Spain) and Manuel Montes y Gómez (INAOE, Mexico) for their support.