纳尔逊河（英语：Nelson River）位于北美洲中北部加拿大马尼托巴省，全长2,575公里（1,600英哩），平均流量2,370立方公尺每秒，集水区面积982,900平方公里（379,500平方英哩），其中180,000平方公里处于美国境内。尼尔逊河发源自温尼伯湖，经过644公里（400英哩）进入哈德逊湾，途经Playgreen Lake、Cross Lake、Sipiwesk Lake、Split Lake和Stephens Lake。

由于尼尔逊河流经温尼伯湖，因此是萨斯喀彻温河（Saskatchewan River）、红河和温尼伯河的一部分，河口流量2,066平方公尺每秒。

The Nelson River is a river of north-central North America, in the Canadian province of Manitoba. The river drains Lake Winnipeg and runs 644 kilometres (400 mi) before it ends in Hudson Bay. Its full length (including the Saskatchewan River and Bow River) is 2,575 kilometres (1,600 mi), it has mean discharge of 2,370 cubic metres per second (84,000 cu ft/s), and has a drainage basin of 1,072,300 square kilometres (414,000 sq mi), of which 180,000 square kilometres (69,000 sq mi) is in the United States.