Samuel Washington (Wat) Arnold (September 21, 1879 – December 18, 1961) was a U.S. Representative from Missouri.

It was also in 1904, on Christmas Eve, that Sam married his wife Myra Gertrude Mills.

[1] The following year, 1905, the Arnolds moved to Atlanta, Missouri, where he began a fifty-plus-year career as a lumberman.

It continued to be a fixture of the Kirksville business community for the next seventy-five years.

Congressman Arnold died in Kirksville, Missouri, December 18, 1961, and was interred in that city's Maple Hills Cemetery.