| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Río Sal | city | Oaxaca | Mexico | 16.20 | -97.12 | 5029 | 3453 |
| Río Sal Abajo | city | Oaxaca | Mexico | 15.88 | -96.31 | 935 | 5268 |
| Río Salado | city | Sucre | Venezuela | 10.63 | -62.24 | 0 | 8177 |
| Río Salado | city | Sucre | Venezuela | 10.67 | -63.06 | 830 | 21985 |
| Río Salinas | city | Peten | Guatemala | 16.24 | -90.42 | 387 | 1387 |
| Río Salinas | city | Chiapas | Mexico | 16.14 | -90.67 | 830 | 1490 |
| Río San Carlos | city | Izabal | Guatemala | 15.73 | -88.68 | 141 | 7812 |
| Río San José | city | Matanzas | Cuba | 23.10 | -81.68 | 288 | 3950 |
| Río San Juan | city | Cibao Nordeste | Dominican Republic | 19.64 | -70.08 | 137 | 5417 |
| Río San Pedro | city | Chihuahua | Mexico | 27.91 | -106.09 | 4501 | 149 |
| Río San Pedro | city | Sucre | Venezuela | 10.22 | -64.42 | 1043 | 67343 |
| Río San Román | city | San Miguel | El Salvador | 13.18 | -88.09 | 78 | 7683 |
| Río Santa Rita | city | Jalisco | Mexico | 20.62 | -103.15 | 5029 | 25859 |
| Río Santiago | city | Oaxaca | Mexico | 18.12 | -96.76 | 4189 | 20797 |
| Río Santiago | city | Ngobe-Bugle | Panama | 8.30 | -81.77 | 830 | 4149 |
| Río Sapo | city | Oaxaca | Mexico | 18.27 | -96.72 | 383 | 14101 |
| Río Saura Zapata | city | Baja California Sur | Mexico | 24.13 | -110.30 | 278 | 47938 |
| Río Seco | city | Cordoba | Argentina | -29.90 | -63.72 | 1000 | 3992 |
| Río Seco | city | Salta | Argentina | -22.87 | -64.17 | 2749 | 894 |
| Río Seco | city | Tarija | Bolivia | -21.77 | -63.58 | 1984 | 447 |
| Río Seco | city | Cesar | Colombia | 10.61 | -73.22 | 830 | 12862 |
| Río Seco | city | Guanacaste | Costa Rica | 10.21 | -85.76 | 137 | 4470 |
| Río Seco | city | Puntarenas | Costa Rica | 10.10 | -84.76 | 830 | 5801 |
| Río Seco | city | Guanacaste | Costa Rica | 9.98 | -85.62 | 830 | 4915 |
| Río Seco | city | Pinar del Rio | Cuba | 22.32 | -83.80 | 95 | 8973 |
| Río Seco | city | Camaguey | Cuba | 21.35 | -77.72 | 229 | 4362 |
| Río Seco | city | Holguin | Cuba | 21.05 | -75.70 | 209 | 4883 |
| Río Seco | city | Guantanamo | Cuba | 20.18 | -75.05 | 830 | 35413 |
| Río Seco | city | Cuba | 22.95 | -81.71 | 183 | 2370 | |
| Río Seco | city | Santiago de Cuba | Cuba | 20.00 | -76.25 | 91 | 3181 |
| Río Seco | city | Quetzaltenango | Guatemala | 14.85 | -91.52 | 7706 | 169137 |
| Río Seco | city | Cortes | Honduras | 15.02 | -88.05 | 1971 | 13655 |
| Río Seco | city | Sinaloa | Mexico | 23.24 | -105.82 | 1669 | 1043 |
| Río Seco | city | Oaxaca | Mexico | 15.94 | -95.75 | 127 | 2002 |
| Río Seco | city | Oaxaca | Mexico | 16.54 | -96.40 | 4189 | 1857 |
| Río Seco | city | Tabasco | Mexico | 17.88 | -93.02 | 65 | 30555 |
| Río Seco | city | Chiapas | Mexico | 16.11 | -91.54 | 2624 | 5492 |
| Río Seco | city | Oaxaca | Mexico | 16.59 | -97.24 | 3704 | 3849 |
| Río Seco | city | Carazo | Nicaragua | 11.81 | -86.27 | 1177 | 25459 |
| Río Seco | city | Lima | Peru | -11.41 | -77.37 | 278 | 3671 |
| Río Seco | city | Junin | Peru | -10.91 | -75.29 | 2509 | 3808 |
| Río Seco | city | Piura | Peru | -5.33 | -79.93 | 830 | 2153 |
| Río Seco | city | Piura | Peru | -5.00 | -80.13 | 862 | 11876 |
| Río Seco | city | La Libertad | Peru | -7.65 | -79.36 | 830 | 6183 |
| Río Seco | city | Ancash | Peru | -9.35 | -78.16 | 2096 | 1043 |
| Río Seco | city | Barinas | Venezuela | 7.48 | -71.48 | 830 | 112 |
| Río Seco | city | Sucre | Venezuela | 10.56 | -63.26 | 1669 | 22244 |
| Río Seco | city | Trujillo | Venezuela | 9.67 | -70.48 | 830 | 12177 |
| Río Seco | city | Falcon | Venezuela | 11.33 | -69.68 | 236 | 33604 |
| Río Seco | city | Sucre | Venezuela | 10.63 | -62.69 | 229 | 5269 |
| Río Seco 1ra. Sección | city | Tabasco | Mexico | 18.01 | -93.38 | 62 | 19908 |
| Río Seco 2da. Sección C | city | Tabasco | Mexico | 18.08 | -93.38 | 39 | 16234 |
| Río Seco Diez y Siete | city | Holguin | Cuba | 21.10 | -75.71 | 104 | 2240 |
| Río Seco Número 17 | city | Holguin | Cuba | 21.10 | -75.71 | 104 | 2240 |
| Río Seco Número Catorce | city | Holguin | Cuba | 21.07 | -75.72 | 164 | 3196 |
| Río Seco Número Dos | city | Panama | Panama | 8.97 | -78.49 | 830 | 0 |
| Río Seco Primera Sección | city | Tabasco | Mexico | 18.01 | -93.38 | 62 | 19908 |
| Río Seco Segunda Sección | city | Tabasco | Mexico | 18.14 | -93.27 | 29 | 12896 |
| Río Seco Segunda Sección ”A” | city | Tabasco | Mexico | 18.05 | -93.38 | 45 | 16473 |
| Río Seco Segunda Sección ”B” | city | Tabasco | Mexico | 18.06 | -93.38 | 42 | 15413 |
| Río Seco Segunda Sección ”C” | city | Tabasco | Mexico | 18.08 | -93.37 | 42 | 16234 |
| Río Seco Tercera Sección | city | Tabasco | Mexico | 18.08 | -93.38 | 39 | 16234 |
| Río Seco Tercera Sección | city | Tabasco | Mexico | 18.16 | -93.26 | 32 | 13948 |
| Río Seco y Montaña | city | Tabasco | Mexico | 17.94 | -93.38 | 78 | 22840 |
| Río Seguidul | city | Veraguas | Panama | 8.07 | -81.40 | 410 | 2455 |
| Río Segundo | city | Cordoba | Argentina | -31.65 | -63.91 | 1079 | 22624 |
| Río Segundo | city | Alajuela | Costa Rica | 10.24 | -84.28 | 4297 | 7199 |
| Río Segundo | city | Alajuela | Costa Rica | 10.00 | -84.19 | 3349 | 100095 |
| Río Sendo | city | Oaxaca | Mexico | 17.89 | -96.89 | 5990 | 3601 |
| Río Sequito | city | Guanacaste | Costa Rica | 10.18 | -85.80 | 29 | 3502 |
| Río Señales | city | Herrera | Panama | 7.88 | -80.82 | 830 | 2831 |
| Río Silencio | city | Esmeraldas | Ecuador | 0.17 | -79.34 | 830 | 4320 |
| Río Sotillo | city | Sucre | Venezuela | 10.28 | -63.87 | 1961 | 19584 |
| Río Sucio | city | Cordoba | Colombia | 7.67 | -75.87 | 830 | 1934 |
| Río Sucio | city | Cordoba | Colombia | 8.03 | -75.68 | 321 | 1490 |
| Río Sucio | city | Cauca | Colombia | 2.52 | -76.83 | 5869 | 5346 |
| Río Sucio | city | Panama | Panama | 8.33 | -78.95 | 82 | 680 |
| Río Sucio Afuero | city | Panama | Panama | 8.33 | -78.95 | 82 | 680 |
| Río Sábalo | city | Panama | 7.98 | -78.22 | 72 | 198 | |
| Río Sábalo Número Uno | city | Panama | 7.98 | -78.22 | 72 | 198 | |
| Río Sáname | city | Cundinamarca | Colombia | 4.32 | -73.95 | 6811 | 10237 |