What Percentage of America's Population Lives within 100 miles of the US-Mexico Border

General

In order to determine which people lived within 100 miles from the border, 2nd level administrative districts were used and if they overlapped a circle which had a radius of 100 miles or less and was centered on the border, then it's entire population was deemed 100 miles from the border. In the USA, 2nd level administrative districts are called counties.

Spreadsheet with numbers per 2nd level admin. district found here.

Tools Used:

Google Earth Pro

mapchart.net

Google

Wikipedia

Map of Counties Selected

Created Using mapchart.net

Findings:

Based of 2013 data provided by Wikipedia and Google

Of the approximately 316.5 million people in the USA, 18.01 million live in counties 100 miles from the Mexican border. 5.69% of the US population lives in counties 100 miles or less from the Mexican border.