Victimisation Surveys and Knowledge of Delinquency: This article is based on an 11 April 2002 presentation at the Survey Methods Seminar of INED and the French Society of Statistics at INED (salle Alfred Sauvy, 133, boulevard Davout, 75020 Paris). After presenting the historical background of victimisation surveys in the framework of quantitative data used in the analysis of crime, this article presents the contributions and limits of such surveys. It provides the basic structure for such questionnaires and various sample frameworks. In closing, it gives results based on a survey in the Paris région in 1998-2000, and compares them with related police statistics.