Warren, Ohio
Starting in 2010, the population of Warren went down by 7.7%. This can be explained by the shutdown of a GM plant, which led to a lot of job losses. The city also happens to have the second highest rate of folks struggling to get enough food across the nation. Ouch.
Union City, New Jersey
There are 68,500 people living in Union City, 23% of which lives in poverty. However, the worst thing about the city would be the fact that it only has an area of 1.28 square miles. This makes it one of the most densely populated places in the United States. The average commute time here is 33 minutes.