The interest toward nanocellulose materials has exponentially grown in recent years. Their scope of applicability is wide and diversified, from emulsion to mechanical reinforcement. The ability of nanocellulose to be used as a substrate or as a dispersing agent is increasingly exploited in the production of flexible electronics and more recently in electromagnetism and radio frequencies (RF) application. Furthermore, in the meantime, the development of more eco-friendly electronic devices is required to answer current societal and political challenges. Both aspects hence make of nanocellulose a high potential material for electronic field and especially for electromagnetism and RF. The aim of this chapter is thus to give a broad overview of the use of nanocellulose in two field applications: electromagnetic interference shielding and RF devices.