Almost 60% of people say their mental health has been impacted by the pandemic, with younger people more likely to have experienced recent difficulties with their well-being.
The fifth Social Impact of Covid-19 survey, from the Central Statistics Office, gives an insight into the way people's lives have changed in the last year.
The research - based on an online questionnaire with 1,621 people earlier this month - shows over 15% said they were downhearted or depressed "all or most of the time", in the four weeks before the survey.
This compares with a figure of 5.5% in a similar study last April during the first wave. Almost three quarters of those aged between 18 and 34 said the pandemic was having a negative impact on their mental health,