The woman, who was in her 40s, was struck at Ballyhagan in Carbury yesterday evening.
Gardai and emergency services attended but she was pronounced dead at the scene - the car's occupants were uninjured.
The woman's body has been taken to Naas General Hospital where a post mortem will take place.
Gardai are appealing for witnesses to contact them.
Teen M9 Fatalities Were Known To Gardai in West Wicklow
The 15 to 18 years old had been involved in several road incidents locally in recent weeks.
Talented Wicklow Pair Shortlisted for National AIB Portrait Prize
Bray photographer Alannah Henry and Donard-based teenage artist Isla Case were named among a combined 46 shortlisted entries, selected from hundreds of submissions from across the country
Wicklow Rose Ready To Bloom On TV Screens Tonight
Carolann McDonald will appear in tonight's second Rose of Tralee live show.
'Nothing Is Off The Table' - Wicklow TD Outlines Concerns Over Planned Fuel Excise Increases
Concern Grows For Missing 53-year-old
Sean Gaughan has now been missing for two weeks
Light rain shower
High: 17°C | Low: 9°C
Light rain shower
High: 17°C | Low: 10°C
Light rain shower
High: 17°C | Low: 7°C
Light rain
High: 16°C | Low: 7°C
Light rain
High: 17°C | Low: 8°C
