How to Build a Count with a Geo Radius

Step 1:

Go to this Custom Radius Search Map. Under the section titled Input, type in your desired radius in terms of miles (or kilometers) in Step 1. In Step 2, type in your zip code, then click Draw Radius.

Step 2:

Scroll down to the Zip Code section. Click Copy to Clipboard. Below that, you can also see the cities within your radius, as well. 

Step 3:

Paste the zip code from your output, then return to the audience builder and paste them into the Zip 5 box.