14. Brownsville-Harlingen, TX
Total number of illegal immigrants: 40,000
Percentage of total population comprising of illegal immigrants: 9.0%
Insider Monkey score: 11.5
Brownsville that ranked 14th on our list of cities with most illegal immigrants in America has recently attracted controversy, with reports claiming that taxpayer dollars are being used to open a shelter for the illegal immigrants, a move which has drawn strong criticism from the residents.