| Amposta | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Catalonia |
| Pushpin Map Caption: | Location in Catalonia |
| Coordinates: | 40.7106°N 0.5808°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Type3: | Comarca |
| Subdivision Name2: | Tarragona |
| Subdivision Name3: | Montsià |
| Leader Title: | mayor |
| Leader Name: | Adam Tomàs Roiget (2015)[1] |
| Area Footnotes: | [2] |
| Area Total Km2: | 138.3 |
| Elevation M: | 8 |
| Population Density Km2: | auto |
| Population Demonyms: | Ampostí, -ina |
| Postal Code Type: | Postal code |
| Area Code Type: | Dialing code |
| Blank Name Sec1: | Official language(s) |
| Blank Name Sec2: | Climate |
| Blank Info Sec2: | Csa |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Amposta (pronounced as /ca/) is the capital of the comarca of Montsià, in the province of Tarragona, Catalonia, Spain, 190 km south of Barcelona on the Mediterranean Coast. It is located at 8 metres above sea level, on the Ebre river, not far from its mouth. Its population was 20,606 in 2018.
The GR 92 long distance footpath, which roughly follows the length of the Mediterranean coast of Spain, has a staging point at Amposta. Stage 30 links northwards to L'Ampolla, a distance of, whilst stage 31 links southwards to the Pont de l'Olivar, a distance of .[3]