| Playas de Rosarito Municipality | |
| Official Name: | Municipio de Playas de Rosarito |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Mexico |
| Subdivision Type1: | State |
| Motto: | Un horizonte de posiblidades (A Horizon of Possibilities) |
| Population As Of: | 2020 |
| Population Total: | 126890 |
| Population Note: | Data source:[1] |
| Population Density Km2: | auto |
| Area Total Km2: | 513.32 |
| Leader Title: | Municipal president |
| Leader Name: | Hugo Torres |
| Subdivision Type2: | Municipal seat |
| Subdivision Name2: | Rosarito |
| Subdivision Type3: | Largest city |
| Subdivision Name3: | Rosarito |
| Blank Name: | INEGI code |
| Blank Info: | 005 |
| Timezone: | PST |
| Utc Offset: | −8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | −7 |
| Coordinates: | 32.3422°N -117.0561°W |
| Website: | Ayuntamiento de Playas de Rosarito |
| Established Title: | Municipality established |
| Established Date: | June 29, 1995 |
| Footnotes: | Source: Enciclopedia de los Municipios de México |
Playas de Rosarito Municipality (Spanish; Castilian: Municipio de Playas de Rosarito) is located in the northwestern part of the Mexican state of Baja California comprising part of the Tijuana metropolitan area. It lies just south of the city of Tijuana. Its municipal seat is the city of Rosarito. According to the 2020 census, the municipality had a population of 126,890 inhabitants.[2] Its area is 513.32 km2 (198.19 sq mi).
At the end of the 18th century, Spanish Dominican missionaries and friars gave the name of El Rosario to an indigenous settlement in the area. The town was part of the mission of San Miguel Arcangel de la Frontera, located a few miles to the south. The mission was founded on March 28, 1787 by the Dominican friar Luis Sales on the banks of the San Juan Bautista stream.
Over time, the name of El Rosario became Rosarito. After the Mexican–American War and the Treaty of Guadalupe Hidalgo, the new Mexican border lay no more than 30 km (18.5 miles) from Rosarito. This brought the development of the Rancho de la Tia Juana, which eventually grew into the city of Tijuana, the region's development hub.
Playas de Rosarito means "beaches of Rosarito".
As of 2020, the municipality had a total population of 126,890.[3]
As of 2010, the city of Playas de Rosarito had a population of 65,278.[4] Other than the city of Playas de Rosarito, the municipality had 358 localities, the largest of which (with 2010 populations in parentheses) were: Ampliación Ejido Plan Libertador (5,906), Primo Tapia (4,921), classified as urban, and Ciudad Morelos (2,040), Colinas del Sol (1,361), and Santa Anita (1,284), classified as rural.[4]