Seissan
| Seissan | |
|---|---|
| The town hall and war memorial in Seissan | |
| Location of Seissan | |
| Coordinates: 43°29′36″N 0°35′38″E / 43.4933°N 0.5939°E | |
| Country | France | 
| Region | Occitania | 
| Department | Gers | 
| Arrondissement | Mirande | 
| Canton | Astarac-Gimone | 
| Intercommunality | Val de Gers | 
| Government | |
| • Mayor (2020–2026) | François Rivière | 
| Area 1 | 18.56 km2 (7.17 sq mi) | 
| Population  (2022) | 1,098 | 
| • Density | 59/km2 (150/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 32426 /32260 | 
| Elevation | 168–283 m (551–928 ft) (avg. 187 m or 614 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Seissan (French pronunciation: [sɛsɑ̃]; Gascon: Sheishan) is a commune in the Gers department in southwestern France.