| Official Name: | Tubarão, Santa Catarina |
| Nickname: | Cidade Azul ("Blue city" in Portuguese) |
| Pushpin Map: | Brazil |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | South |
| Subdivision Name2: | Santa Catarina |
| Leader Title: | Mayor |
| Leader Name: | Joares Carlos Ponticceli (PP) |
| Established Title: | City emancipation |
| Established Date: | May 27, 1870 |
| Area Total Km2: | 300.273 |
| Area Total Sq Mi: | 117.1 |
| Population As Of: | 2020 [1] |
| Population Total: | 106,422 |
| Population Density Km2: | 340.95 |
| Timezone: | UTC-3 |
| Utc Offset: | -3 |
| Timezone Dst: | UTC-2 |
| Utc Offset Dst: | -2 |
| Coordinates: | -28.4667°N -49.0069°W |
| Elevation M: | 9 |
Tubarão (lit. "shark") is a Brazilian municipality located in southern part of Santa Catarina state. The population, according to the IBGE/2020 estimate was 106,422. It is the main city of the Tubarão River basin region, which comprises 20 municipalities and has a population of 350,000.
Tubarão was named after a native tribal chief called Tubanharô, which means "ferocious father" in Guaraní language. Thus, it does not have any relation to the word tubarão ("shark" in Portuguese).
The first settlement, which later became the city, was founded in 1773 by troopers as a halfway point between Laguna and the uplands.
Coal was discovered in Tubarão outskirts in the 18th century.
The city emancipated from Laguna in 1870.
In the following years Italian and German immigrants came to this region.
The Tereza Christina Railway was inaugurated in 1884.
One of the worst natural catastrophes in Brazil took place in Tubarão, on March 28, 1974[2] . The Tubarão River waters flooded about 80% of the urban area. The disaster caused 199 fatalities and left about 45,000 people homeless.
The city is located 133 kilometers south of Florianópolis, the state capital, in the South Brazilian coast plains. Its urban area is crossed by the Tubarão River and, in parallel, the BR-101 federal highway. Some lakes and swamp areas are found in the surrounding areas, although its landscape has been modified several times by human activity. The climate is subtropical (Köppen climate classification).
Neighbor cities are Laguna, Capivari de Baixo, Gravatal, Pedras Grandes, Jaguaruna, São Ludgero, Orleans and Treze de Maio.
The main economy is based on agriculture (rice plantations), furniture industry and ceramic tiles. Tourism is also important due to its thermal water resources in Rio do Pouso and Guarda da Margem Esquerda localities.
The main ethnic groups are Portuguese-Azorians, German and Italian descendants and Afro-Brazilians. Tubarão is 12th largest city in the state. The total population (IBGE/2010) was 97,281.
The most illustrious citizen was Willy Zumblick, a painter of German descent. A museum in the downtown area is named after him.
The local association football teams are Clube Atlético Tubarão and Hercílio Luz Futebol Clube, two of the major teams of southern Santa Catarina.