Slapewath is a hamlet in the borough of Redcar and Cleveland and the ceremonial county of North Yorkshire, England.

Slapewath is reputedly the oldest alum quarry in Cleveland and the United Kingdom.

[5][6] Slapewath alum works was developed in 1604, and continued processing until the early part of the 19th century.

[13] Whilst there was never a public railway station at Slapewath, it was capable of handling goods and was the focal point for ironstone wagons for six mines in the local area.

[14] At some point the North Eastern Railway had a locomotive shed there, although in 1870, it was moved to Brusselton Bank.