As an example, here is a ZIP Code map of Auglaize County, Ohio:
As shown in the above example, if a ZIP Code area falls completely OR partially within the county, it will get included on the map.
If you then want to see all of the ZIP Codes in the surrounding counties too, just click the button on the left side of the map called
When clicked, the button text will change to
Hide Surrounding, which when clicked will get you back to a map of just your specified county.
Also, if you want to see all ZIP Codes across the U.S. at the same time, of course you can just use the ZIP Codes map tool. On that tool, you can try out the
Colorize ZIPs button on the left side to apply colors to the ZIP Code map.
Bonus for reading this far: If you want to create custom maps based on groups of ZIP Codes, be sure and try out the mapBuilder tool found just below most map tools on the website! On the go? Quickly find out what ZIP Code area you are currently in (based on your device location) using the What ZIP Code Am I In? tool, found in the Current Location Tools menu.