The 2017 edition of the Iberian Cosmology Meeting (IberiCOS 2017) will be held in Valencia from the 10th April to 12th April 2017. It will be hosted by the Quantum Black Holes, Supergravity and Cosmology group at the Department of Theoretical Physics & IFIC of the University of Valencia & CSIC, Spain. This series of meetings is aimed at encouraging the interaction and collaboration between researchers working in Cosmology and related areas (Gravitation, Particle Physics, and Astronomy) in Portugal and Spain. Researchers working in other countries are also warmly welcome. The meetings are informal and there is no registration fee. There will be a limited number of invited speakers and all participants wishing to give a talk about their work will be able to do so by naming a topic or title when they register, and submitting their abstract before the 20th of March 2017. Should there be excessive demand, preference will be given to younger researchers. Except for invited talks, all participants will be given 15+5 minutes to present their work. In addition, there may also be time for guided discussions, particularly if there are requests for talks on a common ‘hot’ topic. These meetings are designed to encourage the presentation of work in progress. In this same spirit the meetings will not be restricted to a single focused topic, but are open to cosmologists in the broadest sense, from theoretical particle physics to observational astrophysics. Stimulating interactions between theorists and observers is also a particular concern of the organizers.