St Catherine is located at 18°N 77°W / 18°N 77°W / 18; -77. It is bordered by St Andrew in the east, Clarendon in the west, and by St Mary and St Ann in the north. It has an area of 1,192 km², making it one of Jamaica's largest parish and it is one of the fastest growing parishes in the nation and has the largest economy out of all fourteen parishes. Except for the Hellshire Hills near the coast, the south of the parish is virtually flat. The central and northern sections are very mountainous, however; the northern border is on Mount Diablo, which crosses over into St Ann, the highest point being 686 metres (2,700 ft).