| Official Name: | San Ignacio |
| Settlement Type: | Commune |
| Flag Alt: | Flag |
| Shield Alt: | Coat of arms |
| Mapsize: | 175px |
| Map Alt: | Location of San Ignacio commune in the Ñuble Region |
| Pushpin Map: | Chile |
| Pushpin Mapsize: | 175 |
| Pushpin Label Position: | bottom |
| Pushpin Map Alt: | Location in Chile |
| Pushpin Map Caption: | Location in Chile |
| Coordinates: | -36.5333°N -98°W |
| Subdivision Type: | Country |
| Subdivision Name: | Chile |
| Subdivision Type1: | Region |
| Subdivision Name1: | Ñuble |
| Subdivision Type2: | Province |
| Subdivision Name2: | Diguillín |
| Government Footnotes: | [1] |
| Government Type: | Municipality |
| Leader Title: | Alcalde |
| Leader Name: | Nelson Aedo Figueroa |
| Leader Party: | UDI |
| Unit Pref: | Metric |
| Area Footnotes: | [2] |
| Area Total Km2: | 363.6 |
| Area Total Sq Mi: | 140.4 |
| Population As Of: | 2012 Census |
| Population Total: | 15566 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Population Demonym: | Sanignacino |
| Population Blank1 Title: | Urban |
| Population Blank1: | 4873 |
| Population Blank2 Title: | Rural |
| Population Blank2: | 11233 |
| Demographics Type1: | Sex |
| Demographics1 Title1: | Men |
| Demographics1 Info1: | 8,192 |
| Demographics1 Title2: | Women |
| Demographics1 Info2: | 7,914 |
| Timezone: | CLT[3] |
| Utc Offset: | -4 |
| Timezone Dst: | CLST[4] |
| Utc Offset Dst: | -3 |
| Elevation M: | 132 |
| Elevation Ft: | 433 |
| Area Code: | 56 + 42 |
San Ignacio (pronounced as /es/) is a Chilean town and commune located in the Diguillín Province, Ñuble Region. It spans an area of 363.6sqkm.[2]
According to data from the 2002 Census of Population and Housing, San Ignacio had 16,106 inhabitants; of these, 4,873 (30.3%) lived in urban areas and 11,233 (69.7%) in rural areas. At that time, there were 8,192 men and 7,914 women.[2] Sanignacino is the demonym for a man, and Sanignacina is that of a woman.
As a commune, San Ignacio is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years. For the years 2008-2012, the alcalde is Nelson Aedo Figueroa (UDI), and the councilors are:[1]
Within the electoral divisions of Chile, San Ignacio is represented in the Chamber of Deputies as a part of the 41st electoral district (together with Chillán, Coihueco, Pinto, El Carmen, Pemuco, Yungay and Chillán Viejo). The commune is represented in the Senate