24. Denver-Aurora-Lakewood, CO
Total number of illegal immigrants: 130,000
Percentage of total population comprising of illegal immigrants: 4.7%
Insider Monkey score: 3.5
The illegal population of Denver is so significant, a crackdown on such undocumented people is actually significantly affecting the restaurant businesses, where around 20% of the workers are illegal immigrants.
![25 Cities With Most Illegal Immigrants In America](https://imonkey-blog.imgix.net/blog/wp-content/uploads/2016/02/12032800/shutterstock_314634113-750x500.jpg?auto=fortmat&fit=clip&expires=1755993600&width=480&height=320)
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