Any guidance would be hugely appreciated!
Solved! Go to Solution.
Add this layer into your map via the "add data" and then "data from path".
United States ZIP Code Boundaries - Overview
It's a zip code layer from ESRI. If you have an existing point layer from your CSV, you can use the "select by location" tool to select the zip code polygons based on them containing the centroid point layer. From there, simply export the features from the selection into a new layer and you'll have your specified polygons. This will probably be one of the quicker options with your existing data.
Hope that helps.
Add this layer into your map via the "add data" and then "data from path".
United States ZIP Code Boundaries - Overview
It's a zip code layer from ESRI. If you have an existing point layer from your CSV, you can use the "select by location" tool to select the zip code polygons based on them containing the centroid point layer. From there, simply export the features from the selection into a new layer and you'll have your specified polygons. This will probably be one of the quicker options with your existing data.
Hope that helps.
That worked! Thanks so much @Eugene_Adkins and @BobBooth1.
You can make a point layer for the zip centroids from the table using the XY Table to Point tool.
https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/xy-table-to-point.htm
You can use that as the point layer for selecting the polygons as Eugene suggested.