R in Montreal 2018 is a bilingual conference for the users of R in Montreal and the surrounding area. There will be posters and contributed talks about new developments and applications of R in several domains (machine learning, bioinformatics, finance, etc). There will be keynote talks by Daniel Stubbs (Calcul Québec), Julie Josse (Ecole Polytechnique, France) and Arunkumar Srinivasan (Millenium Management, UK).