| Glanzenberg Castle | |
| Native Name: | Burg Fahr |
| Built: | about 1044 (Burg Fahr) about 1240 (Glanzenberg) |
| Type: | lowland castle |
| Condition: | ruin |
| Location: | Unterengstringen |
| Occupants: | Freiadlige |
| Coordinates: | 47.4022°N 8.4221°W |
| Map Type: | Canton of Zurich#Switzerland |
| Code: | CH-ZH |
| Site Area: | 180x |
Glanzenberg Castle (German: Burg Glanzenberg or German: Ruine Glanzenberg) is a ruined castle in the municipality of Unterengstringen in the Swiss canton of Zurich. It is a Swiss heritage site of national significance.[1]