| Official Name: | Martiago |
| Settlement Type: | Municipality |
| Flag Size: | 150 |
| Coordinates: | 40.4525°N -6.49°W |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Castile and León |
| Subdivision Type2: | Province |
| Subdivision Name2: | Salamanca |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Comarca de Ciudad Rodrigo |
| Subdivision Type4: | Subcomarca |
| Subdivision Name4: | Los Agadones |
| Leader Party: | People's Party |
| Leader Title: | Mayor |
| Leader Name: | Miguel Gregorio Sánchez Castrillo |
| Area Footnotes: | [1] |
| Area Total Km2: | 47 |
| Elevation M: | 811 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 37510 |
Martiago is a municipality located in the province of Salamanca, Castile and León, Spain. As of 2016 the municipality has a population of 302 inhabitants.[2] The municipality is known because of its flat lands favorable for wars. The origin of the name Martiago comes from "Marte" (mart) and "Terra" (Tiago) which means: "Tierra de Marte" (knowing that Marte is the God of War in the Greek mythology) or in other words, meaning that it was there where some wars happened.