| 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 Salinas | city | Chiapas | Mexico | 16.14 | -90.67 | 830 | 1490 |
| Río San Pedro | city | Chihuahua | Mexico | 27.91 | -106.09 | 4501 | 149 |
| Río Santa Rita | city | Jalisco | Mexico | 20.62 | -103.15 | 5029 | 25859 |
| Río Santiago | city | Oaxaca | Mexico | 18.12 | -96.76 | 4189 | 20797 |
| 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 | 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 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 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 Sendo | city | Oaxaca | Mexico | 17.89 | -96.89 | 5990 | 3601 |