The Taoiseach says pubs and restaurants in the three counties will have to close, as part of the local lockdown.
Micheál Martin says people shouldn't use public transport unless it's absolutely essential.
He says the restrictions are needed because the virus is a 'deep and urgent threat'.
The rest of the country will remain in Phase 3.
The decisions being made after the Taoiseach received new advice from the National Public Health Emergency Team on rising cases in the midlands.
The three counties have seen 226 cases in the past 2 weeks, mainly in meat plants.
Those cases accounted for half of all cases in the country in the last fortnight.
- restaurants / pubs close except for takeaway
- nursing home visits and visits to prisons suspended
- preparations for school reopening continue
- Householders to Restrict visitors to 6 people from no more than 3 homes
- Non contact sport groups of no more than 15
- Contact sports cease
Tesla Opens Wicklow Supercharger Station Adding Eight High-Speed Stalls
Almost a Third of Road Deaths Involve Young Drivers, Wicklow Gardaí Warn Ahead Of Bank Holiday
Garden County Housing Figures Buck National Trends
Outpouring Of Love And Tributes to Musician Glen Hansard
Wicklow Beaches To Host Kids Sea Safari Workshops In August