Located in
Humboldt County
Mckinleyville Post Offices
Here are all Mckinleyville CA post office locations. There are many post offices in or around Mckinleyville, California to choose from. Below is the location of each Mckinleyville post office. Get the most up-to-date post office hours in Mckinleyville. Find phone numbers and map out the exact location of the post office you are looking for.