Castin | |
|---|---|
Street of the town hall in Castin. | |
![]() Location of Castin | |
| Coordinates: 43°41′31″N 0°32′50″E / 43.6919°N 0.5472°E | |
| Country | France |
| Region | Occitania |
| Department | Gers |
| Arrondissement | Auch |
| Canton | Gascogne-Auscitaine |
| Intercommunality | CA Grand Auch Cœur Gascogne |
| Government | |
| • Mayor (2020–2026) | Pierrette Luche |
Area 1 | 11.22 km2 (4.33 sq mi) |
| Elevation | 235 m (771 ft) |
| Highest elevation | 266 m (873 ft) |
| Lowest elevation | 148 m (486 ft) |
| Population (2023) | 337 |
| • Density | 30.0/km2 (77.8/sq mi) |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| INSEE/Postal code | 32091 /32810 |
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Castin (French pronunciation: [kastɛ̃]) is a commune in the Gers department in southwestern France.

| Year | Pop. | ±% p.a. |
|---|---|---|
| 1968 | 136 | — |
| 1975 | 141 | +0.52% |
| 1982 | 188 | +4.20% |
| 1990 | 262 | +4.24% |
| 1999 | 261 | −0.04% |
| 2007 | 267 | +0.28% |
| 2012 | 317 | +3.49% |
| 2017 | 343 | +1.59% |
| 2023 | 337 | −0.29% |
| Source: INSEE | ||