Grossaffoltern
| Grossaffoltern | |
|---|---|
| Grossaffoltern-Kosthofen | |
| Location of Grossaffoltern | |
| Coordinates: 47°4′N 7°21′E / 47.067°N 7.350°E | |
| Country | Switzerland | 
| Canton | Bern | 
| District | Seeland | 
| Area | |
|  • Total | 15.06 km2 (5.81 sq mi) | 
| Elevation | 511 m (1,677 ft) | 
| Population  (31 December 2018) | |
|  • Total | 3,017 | 
| • Density | 200/km2 (520/sq mi) | 
| Time zone | UTC+01:00 (Central European Time) | 
| • Summer (DST) | UTC+02:00 (Central European Summer Time) | 
| Postal code(s) | 3257 | 
| SFOS number | 0303 | 
| ISO 3166 code | CH-BE | 
| Localities | Ammerzwil, Kaltenbrunnen, Kosthofen, Ottiswil, Suberg, Vorimholz, Weingarten | 
| Surrounded by | Diessbach bei Büren, Lyss, Rapperswil, Schüpfen, Seedorf, Wengi | 
| Twin towns | Horsovsky Tyn (Czech Republic) | 
| Website | grossaffoltern SFSO statistics | 
Grossaffoltern is a municipality in the Seeland administrative district in the canton of Bern in Switzerland. It is known for its stork colony.