1. California: 39,512,223
2. Texas: 28,995,881
3. Florida: 21,477,737
4. New York: 19,453,561
5. Pennsylvania: 12,801,989
6. Illinois: 12,671,821
7. Ohio: 11,689,100
8. Georgia: 10,617,423
9. North Carolina: 10,488,084
10. Michigan: 9,986,857
California is the most populous state in the United States with nearly 40 million people, followed by Texas, Florida and New York. Pennsylvania, Illinois, Ohio, Georgia, North Carolina and Michigan round out the top 10 most populous states. Each of these states has a population of over 10 million people. The remaining states are all below 10 million residents.