Bischofstein Castle ({{lang-de|Burg Bischofstein}}) may refer to:

• Bischofstein Castle (Germany), a castle on the Moselle river in Germany
• Bischofstein Castle (Switzerland), a castle in the Swiss canton of Basel-Land

• Northern Ireland Open
• Northern Ireland Peace Agreement
• Northern Ireland Practical Shooting Confederation
• Northern Ireland Railways Class 80
• Northern Ireland Regiment AAC
• Northern Ireland Science Park
• Northern Ireland sovereignty referendum, 1973
• Northern Ireland women's national under-17 football team
• Northern Ireland women's national under-19 football team
• Northern Ireland Youth Soccer Tournament
• Northern Irish border
• Northern Irish football clubs in European competition
• Northern Irish football team
• Northern Irish Jews
• Northern irish police
• Northern Irish police
• Northern Irish Premier League
• Northern Irish Tayto
• Northern Iris-skipper
• Northern iris-skipper
• Northern Iron Ore Enrichment Works
• Northern Islands' High School
• Northern Islands High School
• Northern Islands, Northern Mariana Islands
• Northern Islands’ High School