| Piedras Negras | |
| Settlement Type: | Municipality |
| Mapsize: | 300px |
| Pushpin Map: | Mexico |
| Pushpin Label Position: | above |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Mexico |
| Subdivision Type: | Country |
| Subdivision Name: |  Mexico |
| Subdivision Type1: | State |
| Subdivision Name1: | Coahuila |
| Subdivision Type2: | Municipal seat |
| Subdivision Name2: | Piedras Negras |
| Area Total Km2: | 914.2 |
| Population As Of: | 2010 |
| Population Total: | 152,806 |
| Coordinates: | 28.7222°N -100.5681°W |
| Elevation M: | 223 |
Piedras Negras Municipality is one of the 38 municipalities of Coahuila, in north-eastern Mexico. The municipal seat lies at Piedras Negras. The municipality covers an area of 914.2 km2 and is located on the international border between Mexico and the USA, here formed by the Río Bravo del Norte (Rio Grande), adjacent to the U.S. state of Texas.
As of 2010, the municipality had a total population of 152,806.[1]
The largest localities (cities, towns, and villages) are:
| Name | 2010 Census Population | |
|---|---|---|
| 150,178 | ||
| Centro de Readaptación Social Piedras Negras | 830 | |
| Fraccionamiento Villa Real | 767 | |
| El Moral | 390 | |
| La Navaja (La Loma) | 156 | |
| San Isidro | 117 | |
| El Centinela | 110 | |
| Total Municipality | 152,806 |