| Peak Population | Year | State | City | Current Population | % Correct |
|---|---|---|---|---|---|
| 806,343 | 1898 | NY | Brooklyn | -- | 85%
|
| 178,320 | 1960 | IN | Gary | 67,652 | 80%
|
| 138,440 | 1960 | PA | Erie | 92,957 | 74%
|
| 107,312 | 1960 | MN | Duluth | 87,680 | 70%
|
| 196,940 | 1960 | MI | Flint | 79,661 | 70%
|
| 102,394 | 1960 | NY | Niagara Falls | 47,599 | 68%
|
| 143,333 | 1930 | PA | Scranton | 75,805 | 63%
|
| 170,002 | 1930 | OH | Youngstown | 59,108 | 63%
|
| 128,009 | 1950 | NJ | Trenton | 89,620 | 62%
|
| 112,504 | 1940 | DE | Wilmington | 71,675 | 59%
|
| 101,740 | 1930 | NY | Utica | 63,607 | 58%
|
| 124,555 | 1950 | NJ | Camden | 71,100 | 53%
|
| 100,220 | 1980 | VA | Roanoke | 97,171 | 50%
|
| 116,912 | 1950 | OH | Canton | 69,197 | 46%
|
| 111,171 | 1930 | PA | Reading | 94,903 | 43%
|
| 129,896 | 1907 | PA | Allegheny | -- | 42%
|
| 120,485 | 1920 | MA | Fall River | 93,840 | 42%
|
| 111,698 | 1960 | IN | Hammond | 76,193 | 34%
|
| 114,773 | 1960 | VA | Portsmouth | 96,793 | 33%
|
| 100,066 | 2020 | TX | San Angelo | 99,262 | 33%
|
| 104,901 | 2020 | CA | Daly City | 99,833 | 29%
|
| 100,216 | 1970 | OH | Parma | 78,951 | 27%
|
| 103,908 | 1930 | MA | Somerville | 80,407 | 26%
|
| 101,030 | 2020 | WA | Federal Way | 97,701 | 25%
|
| 110,109 | 1970 | MI | Livonia | 92,185 | 21%
|
| 105,549 | 2010 | CA | Norwalk | 98,078 | 13%
|
| 107,439 | 1990 | CA | Citrus Heights | 86,239 | 12%
|