Cape Bon ("Good Cape"), also known as Res et-Teib (Arabic: الرأس الطيب), Shrīk Peninsula, or Watan el Kibli, is a peninsula in far northeastern Tunisia. Cape Bon is also the name of the northernmost point on the peninsula, also known as Res ed-Der, and known in antiquity as the Cape of Mercury (Latin: Promontorium Mercurii; Ancient Greek: Ερμαία ἄκρα) or Cape Hermaeum.

The peninsula's northern shore forms the southern end of the Gulf of Tunis, while its southern shore is on the Gulf of Hammamet.

The peninsula is administered as the country's Nabeul Governorate.

Settlements on the peninsula include Nabeul, Hammam el ghezaz, El Haouaria, Kelibia, Menzel Temime, Korba, and Beni Khalled. Rivers include the Melah and Chiba wadis. Mountains include Kef Bou Krim (237 m or 778 ft), Kef er-Rend (637 m or 2,090 ft), Djebel Sidi Abd er-Rahmane (602 m or 1,975 ft), Djebel Hofra (421 m or 1,381 ft), and Djebel Reba el-Aine (328 m or 1,076 ft). Besides Cape Bon, other headlands on the peninsula are Ras Dourdas and Ras el-Fortass on the northern shore, Ras el-Melah on the short eastern shore, and Ras Mostefa and Ras Maamoura on the southern shore.

The ruins of the Punic town Kerkouane are also located here. Djebel Mlezza ("Mt Mlessa") has tombs from the time of Agathocles, which were excavated just before the First World War.

• Battles of Cape Bon in 468 and in 1941
• El Brij, Tunisia
• Sidi Rais
• Korbous