| Year | Rank | Population | Answer | % Correct |
|---|---|---|---|---|
| 1900 | 1. | 6,100,000 | London | 100%
|
| 1910 | 1. | 7,000,000 | London | 100%
|
| 2. | 7,500,000 | London | 100%
| |
| 2. | 8,000,000 | London | 100%
| |
| 3. | 8,500,000 | London | 100%
| |
| 3. | 8,300,000 | London | 100%
| |
| 4. | 8,100,000 | London | 100%
| |
| 2. | 3,800,000 | New York | 100%
| |
| 2. | 6,200,000 | New York | 100%
| |
| 1920 | 1. | 7,700,000 | New York | 100%
|
| 1930 | 1. | 10,000,000 | New York | 100%
|
| 1940 | 1. | 10,700,000 | New York | 100%
|
| 1950 | 1. | 12,300,000 | New York | 100%
|
| 2. | 14,100,000 | New York | 100%
| |
| 2. | 16,100,000 | New York | 100%
| |
| 3. | 15,600,000 | New York | 100%
| |
| 3. | 16,000,000 | New York | 100%
| |
| 3. | 3,300,000 | Paris | 100%
| |
| 3. | 4,300,000 | Paris | 100%
| |
| 3. | 4,800,000 | Paris | 100%
| |
| 4. | 5,500,000 | Paris | 100%
| |
| 4. | 5,700,000 | Paris | 100%
| |
| 5. | 6,200,000 | Paris | 100%
| |
| 5. | 7,400,000 | Paris | 100%
| |
| 7. | 8,200,000 | Paris | 100%
| |
| 7. | 1,400,000 | Tokyo | 96%
| |
| 5. | 2,900,000 | Tokyo | 96%
| |
| 4. | 4,400,000 | Tokyo | 96%
| |
| 3. | 6,400,000 | Tokyo | 96%
| |
| 2. | 8,800,000 | Tokyo | 96%
| |
| 2. | 11,200,000 | Tokyo | 96%
| |
| 1960 | 1. | 16,600,000 | Tokyo | 96%
|
| 1970 | 1. | 23,200,000 | Tokyo | 96%
|
| 1980 | 1. | 28,500,000 | Tokyo | 96%
|
| 1990 | 1. | 32,500,000 | Tokyo | 96%
|
| 4. | 2,700,000 | Berlin | 91%
| |
| 4. | 3,200,000 | Berlin | 91%
| |
| 5. | 3,700,000 | Berlin | 91%
| |
| 5. | 4,100,000 | Berlin | 91%
| |
| 7. | 4,000,000 | Berlin | 91%
| |
| 6. | 5,300,000 | Moscow | 90%
| |
| 6. | 6,800,000 | Shanghai | 89%
| |
| 6. | 8,300,000 | Los Angeles | 87%
| |
| 7. | 9,500,000 | Los Angeles | 87%
| |
| 5. | 12,000,000 | Sao Paulo | 85%
| |
| 5. | 14,700,000 | Sao Paulo | 85%
| |
| 4. | 8,800,000 | Mexico City | 84%
| |
| 4. | 13,000,000 | Mexico City | 84%
| |
| 4. | 15,600,000 | Mexico City | 84%
| |
| 6. | 12,300,000 | Bombay | 83%
| |
| 5. | 1,700,000 | Chicago | 80%
| |
| 6. | 2,200,000 | Chicago | 80%
| |
| 6. | 3,000,000 | Chicago | 80%
| |
| 6. | 3,800,000 | Chicago | 80%
| |
| 6. | 4,400,000 | Chicago | 80%
| |
| 7. | 3,100,000 | Osaka | 75%
| |
| 5. | 5,000,000 | Osaka | 75%
| |
| 4. | 7,000,000 | Osaka | 75%
| |
| 3. | 10,600,000 | Osaka | 75%
| |
| 3. | 15,200,000 | Osaka | 75%
| |
| 2. | 17,000,000 | Osaka | 75%
| |
| 2. | 18,300,000 | Osaka | 75%
| |
| 7. | 2,000,000 | Buenos Aires | 62%
| |
| 7. | 5,000,000 | Buenos Aires | 62%
| |
| 7. | 6,700,000 | Buenos Aires | 62%
| |
| 5. | 8,400,000 | Buenos Aires | 62%
| |
| 6. | 9,900,000 | Buenos Aires | 62%
| |
| 7. | 11,100,000 | Buenos Aires | 62%
| |
| 6. | 1,600,000 | Vienna | 54%
| |
| 7. | 1,900,000 | Vienna | 54%
|