10 Largest US Cities by Decade

1930

1. New York (NY) – population: 6,930,446
2. Chicago (IL) – population: 3,376,438
3. Philadelphia (PA) – population: 1,950,961
4. Detroit (MI) – population: 1,568,662
5. Los Angeles (CA) – population: 1,238,048
6. Cleveland (OH) – population: 900,429
7. St. Louis (MO) – population: 821,960
8. Baltimore (MD) – population: 804,874
9. Boston (MA) – population: 781,188
10. Pittsburgh (PA) – population: 669,817

Detroit has now tripled its total population between the years 1910 and 1930, and Los Angeles has managed to double its population between 1920 and 1930 while also becoming the first west coast city with more than 1 million inhabitants. During the last 20 years, however, LA’s population has grown in size four times.