International Watch Co, also known as IWC, is a high-end Swiss watch manufacturer located in Schaffhausen, Switzerland. IWC is an active member of the Federation of the Swiss Watch Industry FH.

Located in Schaffhausen, IWC Schaffhausen is notable for being the only major Swiss watch factory located in eastern Switzerland, as the majority of the well-known Swiss watch manufacturers are located in western Switzerland. Notwithstanding the lingua franca of IWC is German.