2,368 customers in Newbridge and surrounding areas are without electricity.
A fault cut supply there at 10.29am this morning.
The fault is centered in the Walshes Park area of Athgarvan, but is affecting homes and businesses in a wide surrounding area.
There are reports that households as far away as Kilcullen are impacted
ESB Networks says it hopes to restore supply by 2pm.
Stock image: Shutterstock