| San Dionisio | |
| Settlement Type: | Municipality |
| Pushpin Map: | Nicaragua |
| Pushpin Label Position: | right |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Nicaragua |
| Subdivision Type: | Country |
| Subdivision Name: |  Nicaragua |
| Subdivision Type1: | Department |
| Subdivision Name1: | Matagalpa |
| Unit Pref: | metric |
| Area Total Km2: | 166 |
| Population As Of: | 2005 |
| Population Total: | 17742 |
| Population Density Km2: | auto |
| Population Urban: | 2576 |
| Coordinates: | 12.75°N -136°W |
| Blank Name: | Climate |
| Blank Info: | Aw |
San Dionisio is a small municipality in the Matagalpa department of Nicaragua.
Originally named Espino Blanco, the town was renamed San Dionisio in honor of Dionisio de Herrera, former President of Nicaragua. This small town is 90miles away from Managua, the capital of Nicaragua, and 30miles away from Matagalpa city, the capital of the Matagalpa Department.
People from this town are informally known as "nichanos". San Dionisio is dominated by mestizos, but there are significant native populations in two sections of the municipality, wibuse and Portillo del Jicaro.
The municipality is divided into the comarcas (villages): El Corozo, El Carrizal, Las Cuchillas, El Ocote, Monte Verde, Piedra Larga, Los Limones, Wibuse, El Tempisque, and El Portillo del Jicaro.
Production is mainly devoted to coffee beans, beans, corn, livestock, and vegetables. Education is available through the secondary level. There is currently a medical center, and a hospital too.
The Rio Calico runs through the town from north-west to south-east. The Matagalpa River is in the south-east.Buses runs all day from Matagalpa and Esquipulas.
Baseball is the major sport. There are many baseball players from this town playing for the Nicaragua team or major Nicaraguan baseball league. These include Benigno Arauz, Jose Angel Arauz, Narciso Zeledon, Sergio Arauz, Evenor Zeledon, and Benedicto Arauz.
The town is predominantly Catholic, but evangelical churches are springing up everywhere. There is a Catholic festivity on October 9 to honor Pope Dionysius (San Dionisio).
Like many small towns in Nicaragua, the residents do not receive much support from central government, only getting attention during Political campaigns. For this reason, change is slow.