The incident occurred about 8:30 a.m. in the 900 block of West Las Lomas Drive.
The injured officer was taken to a hospital after suffering injuries that were not life-threatening, the Police Department said on Twitter.
No descriptions were immediately available of the driver or the vehicle in which he fled the scene.
900 block of West Las Lomas. Suspect rammed his vehicle into officers marked black and white police vehicle while the officer was inside. Officer sustained non-life threatening injuries and transported to a local hospital. Suspect fled in the vehicle. More to follow.— LaHabraPD (@LaHabraPD) September 12, 2019