在托尔金（J. R. R. Tolkien）小说里的中土大陆，法贡森林（Fangorn forest）是树人（Ents）的领土。法贡森林的命名来自最老的树人法贡（树胡）。

在《魔戒:双塔奇兵》里，梅里雅达克·烈酒鹿（Meriadoc Brandybuck）及皮瑞格林·图克（Peregrin Took）进入了法贡森林。他们在这里遇见树胡（Treebeard），并说明萨鲁曼（Saruman）会对树人及法贡森林造成威胁。树人召开树人会议（Entmoot）后，树人同意带同梅里和皮聘进军艾辛格（Isengard），并派遣野树人（Huorns）前往圣盔谷（Helm's Deep）牵制半兽人，萨鲁曼的半兽人砍伐法贡森林的树木着实激起了树人的怒火。

Fangorn (Sindarin: [Fangaorne]; "Beardtree") in J.R.R. Tolkien's Legendarium, was a forest located in the fictional world of Middle-earth and was the home of the tree shepherds, the Ents. It was named after the oldest Ent, Treebeard or Treebeard after it. Tolkien did, however, state that there was confusion about the two. The Forest of Fangorn provided an important role in The Lord of the Rings novel as did Mirkwood and Lothlórien in the Third Age, a time when Sauron challenged Middle-earth to battle and domination. The forest provided the means by where adventure expanded with the breaking up of the Fellowship. Merry Brandybuck and Peregrin Took were the first to discover the Ents were alive but were dwindling in numbers due to the loss of the Entwives. They were lost because of the events of the Last Alliance of Elves and Men. The forest was again severely damaged during the War of the Ring by the forces of Saruman who lived close by in the fortress of Isengard.