This bulletin presents findings regarding the use of cannabis in Ireland from the third drug prevalence survey of households in Ireland and Northern Ireland. A representative sample of adults aged between 15 and 64 years was sampled during late 2010 and early 2011. The bulletin presents results regarding use of cannabis on lifetime (ever used), last year prevalence (recent use) and last month (current use) prevalence rates for Ireland. Prevalence results are also presented for cannabis dependence and cannabis abuse. Finally the bulletin examines a range of important issues including age of first use, frequency of use, methods of using cannabis, how cannabis is obtained and the profile of those who take it. The survey was carried out according to standards set by the European Monitoring Centre for Drugs and Drug Addiction (EMCDDA).