大沢鉱山は新潟県村上市（旧・山北町）にあった鉱山。 金が採掘された。 大澤金山鉱業（株）の経営（1943年閉山）と帝国鉱業（株）の経営の同名別鉱区が所在したが同地がいずれか不詳。 坑口跡、石垣跡が僅かに残るらしい。
Osawa mine was a mine located in Murakami-shi, Niigata prefecture (formerly Yamakita-cho). Gold was mined. The owner of Osawa Jinshan Mining Co., Ltd. (Closed mountain in 1943) and Imperial Mining Co., Ltd. had the same name in different fields but the location was unknown. There seems to be a few remnants of the well head and stone wall.