Nesvizh Castle or Niasvizh Castle (Belarusian: Нясвіжскі замак, Niasvižski zamak, Lithuanian: Nesvyžiaus pilis, Polish: zamek w Nieświeżu, Russian: Несвижский замок, Nesvizhskiy zamok) is a residential castle of the Radziwiłł family in Nesvizh, Belarus. It is 183 metres (600 ft) above sea level.