Tammun (Arabic: طمّون) is a Palestinian town in the Tubas Governorate of the State of Palestine, located 13 kilometers northeast of Nablus and five kilometers south of Tubas in the northeastern West Bank. Tammun had a population of approximately 10,795 inhabitants in 2007 and 13,117 by 2017.

The town's name derives from the Arabic word tammen, meaning "quiet".

van de Velde suggested in 1854 that Tammun was the Biblical town of Tabbath in Ephraim; (see Jgs 7:22); however, Tabbath is now identified with a site in Jordan.

Tammun's modern history dates from the 15th century. The village was founded by a group of people from the Arabian Peninsula seeking to find a safe location in Palestine with a view of other nearby localities. In 1596 it appeared in the Ottoman tax registers as "Tammun", in the nahiya of Jabal Sami in the liwa of Nablus. It had a population of 15 households and 3 bachelors, all Muslim. The villagers paid a fixed tax rate of 33.3% on wheat, barley, summer crops, olive trees, occasional revenues, goats and beehives; a total of 5,450 akçe.

Over the past four centuries, people from the towns of Kafr Qaddum and Halhul have settled in the village. A small portion of the residents came from Egypt.

In 1882, the PEF's Survey of Western Palestine described Tammun as "A good-sized village at the foot of the mountain, with open ground to the north. The village stands high, with olives to the south.

In the 1922 census of Palestine, conducted by the British Mandate authorities, Tammun had a population of 1,345, all Muslim. This had increased in the 1931 census of Palestine, when Tammun, (including Atuf), had 316 occupied houses and a population of 1,599, again all Muslim.

In the 1945 statistics, the population was 2,070 Muslims, with 98,080 dunams of land, according to an official land and population survey. 393 dunams were used for plantations and irrigable land, 33,181 dunams for cereals, while 157 dunams were built-up (urban) land.