NiP coatings produced by electrodeposition have important mechanical, tribological and electrochemical properties. They can also exhibit catalytic activity and beneficial magnetic behaviour. With subsequent thermal treatment, the hardness of such NiP coatings can approach or exceed that of hard Cr coatings. Electrochemical codeposition of homogeneously dispersed second phase particles within the NiP matrix can enhance deposit properties and meet the challenging demands on modern engineering coatings. A general overview of research work on the electrodeposition of NiP composite coatings containing included ceramic or solid lubricant particles is provided. Advances in research into NiP composite layers reinforced by SiC, B4C, WC, Al2O3, SiO2, TiO2, CeO2, MWCNT, MoS2, WS2, TiN, hexagonal BN, PTFE and their combinations are considered. Major models proposed for the codeposition of particles, the influence of bath hydrodynamics and control of operational parameters are illustrated by examples. Important trends are highlighted and opportunities for future R & D are summarised. Display omitted •The electrodeposition of Ni-P coatings containing included particles is reviewed.•Substrate, reactions, bath composition/additives and flow are important.•Developments include pulse plating and nanostructured particle deposits.•Expanding application areas include tribology and corrosion protection.•Aspects deserving further R & D are identified.