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.
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Low-level cloud
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High: 10°C | Low: 6°C
Low-level cloud
High: 10°C | Low: 6°C
Sunny intervals
High: 10°C | Low: 4°C
