[6] The James River flows southeasterly through the central portion of LaMoure County, and a tributary of the South Branch Maple River flows southerly from the center of the county.

[7] The terrain slopes to the south and east; its highest point is on its upper west boundary line at 2,047 ft (624 m) ASL.

In terms of ancestry, 63.0% were German, 27.6% were Norwegian, 6.2% were Swedish, 6.1% were Russian, 6.0% were English, and 2.8% were American.

Source:[7] The United States Navy commissioned two tank landing ships named for the county.

The first, USS La Moure County (LST-883), was commissioned January 23, 1945, and served until December 7, 1959.

The second, USS La Moure County (LST-1194), was commissioned December 1, 1971 and served until November 17, 2000.