156 of the cases are in Dublin.
255 new cases of Covid-19 have been reported to the Health Protection Surveillance Centre.
The HPSC has also been notified that one more person with Covid-19 has died in Ireland.
34% of the cases are confirmed to be associated with outbreaks or are close contacts of a confirmed case while 69 cases have been identified as community transmission.
156 of the cases are in Dublin, 22 are in Waterford, 13 are in Donegal, 11 are in Wicklow, nine are in Limerick, eight are in Kildare, five are in Clare and the remaining 31 cases are in Carlow, Cork, Galway, Kerry, Laois, Longford, Louth, Mayo, Meath, Offaly, Tipperary, Westmeath and Wexford.
The HSE is working to identify any contacts the patients may have had to provide them with information and advice to prevent further spread.
There is now a total of 30,985 confirmed cases of Covid-19 in Ireland.
The Northern Ireland Department of Health reported on Sunday that an additional 87 people have tested positive for coronavirus in the North.
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