Named after Judge Benton S. Grosscup, a former vice-president of the Northern Pacific Railroad.

[1] The settlement was founded and developed during the late 19th and early 20th centuries, because of the fertile land and favorable climate for agriculture in the region.

The gradual integration of Grosscup into West Richland occurred during the years of 1954 and 1955, as the town of Enterprise, Washington, joined West Richland with a vote of 218 to 80 in march 1954.

[1] Then on June, 7th 1955 Another vote was put in place to annex the rest of Heminger's acres which included Grosscup.

This Benton County, Washington state location article is a stub.