雷尼湖（英语：Rainy Lake，法语：lac à la Pluie）是位于美国和加拿大边境的湖泊，面积894平方公里（345平方公里）。

雷尼湖位于明尼苏达州国际瀑布城的水力发电厂水坝附近，因此水位受当局监察。

雷尼湖是钓鱼热点，很多小岛上都有钓鱼休闲区和渡假屋，旅游业是当地的主要经济支柱。

Rainy Lake (French: lac à la Pluie; Ojibwe: gojiji-zaaga'igan) is a relatively large freshwater lake (360 square miles (930 km)) straddling the border between the United States and Canada. The Rainy River issues from the west side of the lake and is harnessed to make hydroelectricity for US and Canadian locations. The sister cities of International Falls, Minnesota, and Fort Frances, Ontario, are situated on either side of the outflow of the river from the lake. Rainy Lake and Rainy River establish the boundary between the two countries.