| River | City | Population | % Correct |
|---|---|---|---|
| Hudson | New York City | 8,478,070 | 88%
|
| Rio Grande | El Paso | 681,725 | 82%
|
| Sacramento | Sacramento | 535,800 | 82%
|
| South Plate | Denver | 729,020 | 76%
|
| Missouri | Kansas City | 516,035 | 76%
|
| Mississippi | Memphis | 610,915 | 76%
|
| Potomac | Washington | 702,255 | 76%
|
| Cumberland | Nashville | 704,965 | 71%
|
| Columbia | Portland | 635,745 | 71%
|
| Trinity | Dallas | 1,326,090 | 65%
|
| Delaware | Philadelphia | 1,573,915 | 65%
|
| Colorado (TX) | Austin | 993,590 | 59%
|
| Ohio | Louisville | 640,800 | 53%
|
| Yellowstone | Billings | 117,120 | 41%
|
| Arkansas | Tulsa | 415,155 | 41%
|
| Red (north) | Fargo | 136,290 | 35%
|
| Brazos | Waco | 146,610 | 35%
|
| San Joaquin | Fresno | 550,110 | 29%
|
| St. Johns | Jacksonville | 1,009,835 | 29%
|
| Tanana | Fairbanks | 32,520 | 24%
|
| Tennessee | Knoxville | 198,775 | 24%
|
| Colorado | Yuma | 100,860 | 24%
|
| White (AR,MO) | Fayetteville | 103,135 | 18%
|
| Canadian | Norman | 131,015 | 18%
|
| Connecticut | Springfield | 154,885 | 18%
|
| Pecos | Carlsbad | 31,500 | 12%
|
| Gila | Goodyear | 118,190 | 12%
|
| Susquehana | Harrisburg | 50,650 | 12%
|
| Red (south) | Shreveport | 177,955 | 12%
|
| North Platte | Casper | 59,040 | 6%
|
| James (ND, SD) | Jamestown | 15,690 | 6%
|
| Wabash | Lafayette | 121,375 | 6%
|
| Kuskokwim | Bethel | 6,270 | 0%
|
| Bear | Evanston | 11,810 | 0%
|
| Green | Green River | 11,820 | 0%
|
| St. Lawrence | Ogdensburg | 10,060 | 0%
|
| Sabine | Orange | 18,080 | 0%
|
| Snake | Pasco | 80,040 | 0%
|