West Street Baptist Church (formerly Zion Chapel) is a Baptist church in East Grinstead, a town in the district of Mid Sussex, one of seven local government districts in the English county of West Sussex. Founded in 1810 as a chapel linked to the Countess of Huntingdon's Connexion, it was the first Nonconformist place of worship in East Grinstead; the town's subsequent development made it a local centre of both Protestant Nonconformity and alternative religions.