房総半島
Located in the mountainous area that divides the center of Bōsō Peninsula, Nagara has little flat terrain. The town consists primarily of rolling, sometimes steep, hills. While the town has no major rivers, several dams, including the Nagara Dam, have been constructed to support the water sources of the Bōsō Peninsula. Nagara is located about 25 kilometers from the prefectural capital at Chiba and within 50 to 60 kilometers from the center of Tokyo.