The Tánaiste said a decision is likely today, after the North Announces it's plans.
The government will make a decision later today on whether to impose tougher Covid-19 restrictions in border counties.
Northern Ireland is to announce plans for a four-week lockdown this morning, with all pubs and restaurants expected to be closed and schools shutting for an extended 2-week Halloween break.
A formal announcement is due during a special sitting of the Stormont Assembly, to respond to rapidly-rising infection rates.
Tánaiste Leo Varadkar says once an announcement is made, the Irish government will make a decision on border counties.
''We do our best to cooperate and coordinate as much as we possibly can'', he said.
''And obviously as your listeners would know, the incidence of the virus in Donegal, Cavan and Monaghan in particular is very very high.
''So we'll have to make a decision probably some time today as to whether we'll have to respond with increased measures in the border counties as well.''
Last night, 811 new cases of Covid-19 were confirmed along with a further three deaths.
The median age of the new cases was 30 years old and there were 190 in Dublin, 141 in Cork, 62 in Wexford, 51 in Kerry, 50 in Clare, with the remaining 317 spread across all remaining counties.
