The Leizhou Peninsula, alternately romanized as the Luichow Peninsula, is a peninsula in the southernmost part of Guangdong Province in South China.

The Leizhou Peninsula is the third largest peninsula in China with an area of c. 8,500 square kilometers (3,300 sq mi) located on the southwestern end of Guangdong, with the Gulf of Tonkin to the west and the 30 km wide Qiongzhou Strait to the south, separating the peninsula from Hainan Island. It is the most southerly point of continental China.^{[citation needed]}

Geologically, basalt terraces account for 43% of the peninsula’s area. The rest is divided up between marine terraces (27%) and alluvial plains (17%). Leizhou Peninsula is dotted with a few dormant volcanoes, beaches, and low-lying diluvial plains.

Leizhou has two separate volcanic fields: a Pleistocene–Holocene field at the northern end of the peninsula west of Zhanjiang (雷北火山群, Leibei Huoshanqun) and the northern end of the Qionglei or Leiqiong volcanic field, which extends across the strait into northern Hainan (雷南火山群, Leinan Huoshanqun). The volcanoes derive from the east-to-west tectonic extension and thinning of the lithosphere connected with the creation of the South China Sea‘s basin. Two Pleistocene-era basaltic stratovolcanoes are Yingfengling (鹰峰岭) and Tianyang (田洋), 15 km (9.3 mi) apart in the center of the peninsula.^[2] There is also a third volcanic field responsible for some of the islands offshore (火山岩岛屿, Huoshanyan Daoyu).