The list only looks at cities of 300,000 people or more, and it's using data from 2014.
1. Detroit, Michigan - 39.3%
2. Cleveland, Ohio - 39.2%
3. Fresno, California - 30.5%
4. Memphis, Tennessee - 29.8%
5. Milwaukee, Wisconsin - 29%
6. St. Louis, Missouri - 28.5%
7. Stockton, California - 28.1%
8. New Orleans, Louisiana - 27.8%
9. Miami, Florida - 26.2%
10. Philadelphia, Pennsylvania - 26%
Census bureau: Detroit is poorest big city in U.S.