| River | Population | City | % Correct |
|---|---|---|---|
| Rio Grande | 803,086 | El Paso | 95%
|
| St. Lawrence | 8,608,208 | Chicago | 92%
|
| Colorado | 3,629,114 | Phoenix | 92%
|
| Mississippi | 2,150,706 | St. Louis | 92%
|
| Mississippi | 2,734,203 | Denver | 89%
|
| St. Lawrence | 5,429,524 | Toronto | 87%
|
| St. Lawrence | 3,797,090 | Detroit | 86%
|
| St. Lawrence | 3,519,595 | Montreal | 86%
|
| Columbia | 1,849,898 | Portland | 84%
|
| Mississippi | 2,650,890 | Minneapolis | 81%
|
| Colorado | 1,866,011 | Las Vegas | 79%
|
| Mississippi | 1,519,417 | Kansas City | 75%
|
| St. Lawrence | 1,780,673 | Cleveland | 73%
|
| Colorado | 843,168 | Tucson | 73%
|
| Columbia | 349,684 | Boise | 68%
|
| Rio Grande | 1,460,200 | Ciudad Juárez | 67%
|
| Columbia | 387,847 | Spokane | 65%
|
| Columbia | 236,632 | Salem | 63%
|
| Nelson | 1,237,656 | Calgary | 59%
|
| Nelson | 1,062,643 | Edmonton | 57%
|
| Columbia | 247,421 | Eugene | 57%
|
| Mississippi | 1,733,853 | Pittsburgh | 54%
|
| Nelson | 711,295 | Winnipeg | 54%
|
| Rio Grande | 1,288,000 | Monterrey | 52%
|
| Nelson | 245,181 | Saskatoon | 48%
|
| Nelson | 214,631 | Regina | 44%
|
| Rio Grande | 932,600 | Chihuahua | 32%
|
| Rio Grande | 811,500 | Saltillo | 10%
|
| Colorado | 249,400 | Nogales | 5%
|
| Colorado | 184,400 | San Luis Río Colorado | 5%
|