10. Riverside-San Bernardino-Ontario, CA
Total number of illegal immigrants: 250,000
Percentage of total population comprising of illegal immigrants: 5.6%
Insider Monkey score: 16.5
The illegal immigrants residing in Riverside-San Bernardino-Ontario are at risk of being deported, as raids have been conducted in these areas to identify illegal immigrants. Now, let’s see what’s next on our list of cities with most illegal immigrants in America.