The electrical behaviour of thin films obtained by a variety of processes, e.g. thermal evaporation in vacuum, have been extensively studied. However, the study of organic mono- and multilayer films obtained by the Blodgett–Langmuir technique (commonly referred to as Langmuir films) has gained considerable momentum only during the past decades. Unlike evaporated films, the striking features of these organic films are their controllable thicknesses down to one monolayer (~ 25 Å) and the possibility of obtaining them free from holes and conducting imperfections. The aim of this paper is to describe the film deposition techniques, some of the properties of the films so obtained and to review their electrical behaviour. It is also intended to make this review a comprehensive and up-to-date source of information for those who are either already engaged in this field or are planning to make Langmuir films the subject for future investigations.