St Martha's Hill is a landmark in St Martha in Surrey, England between the town of Guildford and village of Chilworth. It is the 18th highest hill in the county and on the Greensand Ridge, in this case at the closest point to the North Downs, commencing to the immediate north at the Guildown-Merrow Down in the parishes of Guildford and Merrow. The top of the hill provides a semi-panorama of Newland's Corner also in the Surrey Hills AONB. Its church is the main amenity of the small parish extending to the south into the streets of Chilworth, with some medieval stone incorporations from a 12th-century predecessor and is a wedding venue mainly to outside the sparsely populated parish.