The village of Merstham is located within the county of Surrey.
The Parish Church (a Grade II* listed building) is called Merstham: St Katharine and serves the parish of Merstham and the benefice of Merstham, South Merstham and Gatton and belongs to the diocese of Southwark.
Merstham is situated in the South East (England) region of the UK and is governed by Reigate and Banstead, council.
The village of Merstham is in the East Surrey region of Surrey, East and West Sussex within South East (England).