| Place name (English): | Castle Semple |
| Place name (local language): | |
| Place name (alt. local language): | Castle Sempill |
| Place name (older spelling): | Castletoun |
| Place name (other common spelling/language): | |
| Place type: | building |
| Is in the area of: | Renfrewshire |
| Note: |
| 1 | Robert Sempill (1672-11 November 1737), parents: Archibald Sempill of Dykehead |