| Terra Alta | |
| Native Name Lang: | ca |
| Settlement Type: | Comarca |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Region |
| Subdivision Name2: | Terres de l'Ebre |
| Subdivision Type3: | Province |
| Subdivision Name3: | Tarragona |
| Seat Type: | Capital |
| Seat: | Gandesa |
| Leader Title1: | Body |
| Leader Name1: | Terra Alta Comarcal Council |
| Leader Title2: | President |
| Leader Name2: | Lluís Agut (UPTA–PSC) TBD (ERC) |
| Parts Type: | Municipalities |
| Parts Style: | list |
| P1: | Arnes, Batea, Bot, Caseres, Corbera d'Ebre, La Fatarella, Gandesa, Horta de Sant Joan, El Pinell de Brai, La Pobla de Massaluca, Prat de Comte, Vilalba dels Arcs |
| Area Total Km2: | 743.0 |
| Population Total: | 12,119 |
| Population As Of: | 2014 |
| Population Density Km2: | auto |
| Population Demonym: | |
| Blank Name Sec1: | Largest municipality |
| Blank Info Sec1: | Gandesa |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Area Code Type: | Dialing code |
| Website: | www.terra-alta.cat |
Terra Alta (pronounced as /ca/) is a sparsely populated inland comarca (county) in Terres de l'Ebre, Catalonia (Spain). Its capital is Gandesa. It is also known as Castellania, a name dating back to its medieval status as a fiefdom held by the Order of Knights of the Hospital of St. John of Jerusalem under the Crown of Aragon.
| Municipality | Population(2014)[1] | Areakm | |||
|---|---|---|---|---|---|
| align=right | 474 | align=right | 43.0 | ||
| align=right | 1,975 | align=right | 128.4 | ||
| align=right | 630 | align=right | 34.9 | ||
| align=right | 267 | align=right | 42.9 | ||
| align=right | 1,136 | align=right | 53.1 | ||
| align=right | 1,051 | align=right | 56.5 | ||
| align=right | 3,091 | align=right | 71.2 | ||
| align=right | 1,219 | align=right | 119.0 | ||
| align=right | 1,076 | align=right | 57.0 | ||
| align=right | 354 | align=right | 43.4 | ||
| align=right | 164 | align=right | 26.4 | ||
| align=right | 682 | align=right | 67.2 | ||
| • Total: 12 | align=right | 12,119 | align=right | 743.0 |