| Alt-Bechburg Castle | |
| Built: | c. 1000-1100 |
| Type: | hill castle |
| Condition: | ruin |
| Location: | Holderbank |
| Occupants: | counts |
| Coordinates: | 47.3322°N 7.7717°W |
| Map Type: | Canton of Solothurn#Switzerland |
| Code: | CH-SO |
Alt-Bechburg Castle is a castle in the municipality of Holderbank of the Canton of Solothurn in Switzerland. It is a Swiss heritage site of national significance.[1]