| Official Name: | Tercero |
| Native Name Lang: | es |
| Settlement Type: | Barrio |
| Pushpin Map: | Caribbean |
| Pushpin Map Caption: | Location of Puerto Rico |
| Coordinates: | 18.011°N -66.6101°W |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Commonwealth |
| Subdivision Name: |  Puerto Rico |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | Ponce |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 0.08 |
| Area Land Sq Mi: | 0.08 |
| Area Water Sq Mi: | 0 |
| Population As Of: | 2010 |
| Population Note: | Source: 2010 Census |
| Population Total: | 668 |
| Population Density Sq Mi: | 8350 |
| Timezone: | AST |
| Utc Offset: | -4 |
| Elevation Ft: | 52 |
Tercero (Barrio Tercero) is one of the 31 barrios of the municipality of Ponce, Puerto Rico. Together with Primero, Segundo, Cuarto, Quinto, and Sexto, Tercero is one of the municipality's six core urban barrios. It was organized in 1878.[2]
Tercero is an urban barrio located in the southern section of the municipality, within the Ponce city limits, and east of the traditional center of the city, Plaza Las Delicias.
Barrio Tercero is bounded on the North by Isabel Street, on the South by Comercio/Francisco Parra Duperón Street, on the West by Plaza Degetau and Plaza Munoz Rivera Streets, and on the East by Rio Portugues.[3]
In terms of barrio-to-barrio boundaries, Tercero is bounded in the North by Barrio Quinto, in the South by Cuarto, in the West by Segundo, and in the East by Machuelo Abajo and San Antón.
In 2000, Tercero had 0.1sqmi of land area and no water area. The population of Tercero was 773. The population density in Tercero was 10,134 persons per square mile.[4]
In 2010, it had 0.08sqmi of land area and no water area. Its population was 668 persons, and it had a density of 8,350 persons per square mile.[5]
Tercero is home to many city landmarks.[6] The Antonio Arias Ventura promenade, Ponce History Museum, Tricentennial Park, Teatro La Perla, and the Museum of Puerto Rican Music are all located in Barrio Tercero. Also, the NRHP-listed Banco de Ponce, Ponce High School, Banco Crédito y Ahorro Ponceño, and Salazar-Candal House are found in Barrio Tercero as well.