A man in his 50s has been arrested in connection with the collision - he's being held at Kildare Garda Station under Section 4 of the Criminal Justice Act.
It happened at around 8pm on Thomas Street in Newbridge last night where a woman in her 40s was found with serious injuries.
She was taken to Naas General Hospital where she was pronounced a short time later.
Gardaí say the results of a post-mortem will determine the course of the investigation.
Anyone with information to the incident or has dashcam footage are being asked to contact Newbridge Garda Station.
Soc Dems Wicklow TD Blasts €19B Electricity Network Upgrade Amid Rising Household Costs
Water Infrastructure Project Plans To Shore Up Wicklow Supply For Decades To Come
Go-Ahead Ireland to Create 400 Jobs Boosting Public Transport in Wicklow
Pat Devlin Calls Time After Four Decades With Bray Wanderers
Wicklow Musician Earns National Business Award For Merging Traditional Culture And Wedding Celebration
