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Prevalence Data

 How many people use drugs and alcohol in Ireland?

Drug prevalence is the proportion of a population who have used drugs in a given time period.

Every four years the National Advisory Committee on Drugs and Alcohol, and the Northern Ireland Public Health Information and Research Branch, commission a survey of the general population to estimate the number of people in Ireland who use drugs and alcohol. The 2014/15 survey involved 9,505 people (7,005 in Ireland and 2,500 in Northern Ireland).
Bulletin one: overall results 
Bulletin two: regional results 
Bulletin three: cannabis results (summary)
Bulletin four: polydrug and new psychoactive substances 

Bulletin five: prescription drug use
The main purpose of the European School Survey Project on Alcohol and Other Drugs (ESPAD) is to collect comparable data on substance use among European students aged 15 and 16 in order to monitor trends within, as well as between, countries. The 2019 wave of the ESPAD survey marked the 7th occasion that Ireland has participated in this collaborative international project. Findings were published in November 2020.
2019 ESPAD survey European results
2019 ESPAD survey Irish results

2016 ESPAD survey European results
2016 ESPAD survey Irish results and ESPAD summary article from Drugnet Ireland 60 and 2016 ESPAD summary article of Irish results
The Irish Health Behaviour in School-aged Children (HBSC) study 2018 is the sixth time that data of this kind have been collected from young people (school going children aged 9-18 years) across the Republic of Ireland. Substance use questions cover tobacco, alcohol and cannabis use.

Trends in health behaviours, health outcomes and contextual factors between 1998-2018: findings from the Irish Health Behaviour in School-aged Children Study.

Irish Health Behaviour in School-aged Children (HBSC) study 2018 
HBSC Ireland 2014: alcohol and cannabis use in school-children in Ireland.

Growing up in the West. Planet Youth county reports 2020, published April 2021 - Galway, Mayo, Roscommon.

State of the nations children: key findings 2020 and children's outcomes