This paper provides a social and geographic account of al-Lajjun (Jenin Sub-district), a prominent Palestinian village during the British Mandate period (1918–1948). It portrays a countryside in renewal, encapsulated in the story of Umm al-Fahm’s expansion and Lajjun’s resettlement. In contrast to existing scholarship, the present work contextualizes the site within the wider diachronic, longue durée, history of the region, and the synchronous, shifting pattern of settlements in Marj ibn ‘Amir (Jezreel Valley), Bilad al-Ruha (Ramot Menashe), and Wadi ‘Ara (Nahal ‘Iron). It focuses on the development of the physical outlines of the (re)new(ed) village, with the development of three “Lajjuns” reflecting its founders’ Hebronite/Khalīlī patterns of settlement. Furthermore, it explores Lajjun’s diversified economy and its metamorphosis from a derelict hamlet into a hub of utilities and transportation infrastructure of regional importance under the British Mandate of Palestine (1920–1948).