Dozens of people were removed from the Dundalk site
Sinn Féin says a halting site in Dundalk, where residents have been told to leave, should instead be refurbished.
The party's leader says it's unjust to evict people from their homes when there's no relocation plan in place.
Twelve families were recently removed from Woodlands Park by the local council.
This Wednesday has been set as the eviction day for residents from the halting site.
Sinn Féin TD for Louth Gerry Adams, says 20 children and a number of pregnant women are among those who have been left homeless.
"Some women have told me that they slept in cars," said Adams, adding "one woman told me that she slept in the back of a van. There's no plan at all by the council to re-house the people".