The Thayer House at 109 Jefferson St. in Thompson Falls in Sanders County, Montana was home of Arthur W. Thayer, a mining entrepreneur and editor of the Sanders County Ledger.

The stone house, built in 1907, was described as "The most portentious residence in Thompson" by the Ledger.

[2] It is "French southern Colonial" in style and was listed on the National Register of Historic Places in 1986.

[1] It was built of stone from Thayer's quarry on the Thompson River, with the stone brought during the winter by teamster Eugene Preston by two four-horse sleighs.

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