The Onyx Post Office is located in the state of California within Kern County. This location serves 614 Onyx residents with a median income of $36,650. It's estimated that approximately 980 packages pass through this post office each year.
The Onyx Post Office is located in the state of California within Kern County. This location serves 614 Onyx residents with a median income of $36,650. It's estimated that approximately 980 packages pass through this post office each year.