[1] Lamoine is located 13 miles (21 km) northeast of Waterville on Road 8 NW.

Before Lamoine received its name, the town of Arup, Washington, was platted and filed on Nov. 20, 1905, by the immigrant farmer Nels P. Nelson (1861–1935).

Nelson was anticipating the railroad's running through the newly formed Arup, but in 1909 the Great Northern Railway bypassed it and went through Withrow instead.

The story of Lamoine's receiving its name was written and posted in the Withrow Banner by the paper's publisher, W. H. Murray: It was originally called "Arup."

[3] Some of the original family names that homestead this area during the late 1800s were Lanphere, Jensen, Cunningham, Preugschat, Nelson, Schmidt, Fletcher, and Moore.