伍兹湖（英语：Lake of the Woods）位于加拿大的安大略省和马尼托巴省以及美国的明尼苏达州境内，分隔美国本土和明尼苏达州部分地区如西北角（Northwest Angle）和Angle Inlet，如要前往只能从明尼苏达州渡湖或从加拿大出发。

湖水主要经雷尼河（Rainy River）、肖尔湖（Shoal Lake）、卡卡吉湖（Kakagi Lake）和其他小河流入，然后经温尼伯河流出至温尼伯湖。

伍兹湖长度和阔度均超过70英哩，湖上有超过14,552个岛屿，湖岸线长逾65,000英哩（即105,000公里），是加拿大境内湖岸线最长的湖泊（不包括部分不在加拿大境内的湖泊）。

Lake of the Woods (French:lac des Bois) is a lake occupying parts of the Canadian provinces of Ontario and Manitoba and the U.S. state of Minnesota. It separates a small land area of Minnesota from the rest of the United States. The Northwest Angle and the town of Angle Township can only be reached from the rest of Minnesota by crossing the lake or by traveling through Canada. The Northwest Angle is the northernmost part of the contiguous United States. Its "northwesternmost point" served as a problematic landmark in treaties defining the international border.