[1] The county was named for Alfred Greenwood, a U.S. congressman from Arkansas that advocated Kansas statehood.

For many millennia, the Great Plains of North America was inhabited by nomadic Native Americans.

In 1802, Spain returned most of the land to France, but keeping title to about 7,500 square miles.

In 1803, most of the land for modern day Kansas was acquired by the United States from France as part of the 828,000 square mile Louisiana Purchase for 2.83 cents per acre.

The last time a Democratic candidate has carried this county was in 1936 by Franklin D. Roosevelt.

Greenwood County was a prohibition, or "dry", county until the Kansas Constitution was amended in 1986 and voters approved the sale of alcoholic liquor by the individual drink with a 30% food sales requirement.

[17] † means a community is designated a Census-Designated Place (CDP) by the United States Census Bureau.

The city of Eureka is considered governmentally independent and is excluded from the census figures for the townships.