Kaapmuiden (Cape Mouth) is a small farming town situated at the confluence of the Kaap and Crocodile Rivers in Mpumalanga, South Africa. The town lies just off the N4 national highway and is marked by a large abandoned silo visible from the road. The silo has since been repainted to add to tourism appeal. The farms in the region produce sugarcane, subtropical fruit and vegetables. The town began as a junction on the Pretoria - Delagoa Bay railway line.
Recently the town underwent some development due to the Sasol pipeline and construction and upgrading of the national highway. The Nkomazi Tollgate has subsequently been built on the outskirts of the town.