St Giles' Church is an Anglican church in the village of Horsted Keynes in Mid Sussex, one of seven local government districts in the English county of West Sussex. Serving an extensive rural parish in the Sussex Weald, it stands at the north end of its village on the site of an ancient pagan place of worship. The present building succeeds the original wattle and daub church, its wooden successor and a Saxon stone building—although the Norman architects who erected the cruciform structure in the 12th century preserved parts of the Saxon fabric.