"N.S." Greene (January 21, 1810 – October 4, 1900) was an American businessman and politician. Born in Saratoga County, New York, Greene moved to Milwaukee, Wisconsin Territory and then to Milford, Wisconsin where he owned a general store and operated a lumber and milling business.
In 1863, Greene served in the Wisconsin State Assembly and was a Republican.
During the American Civil War, Greene served as a draft commissioner.
In 1884, Greene moved to Fort Atkinson, Wisconsin where he owned a dairy.