The Sanders County Jail is a historic jail built in 1907 in Thompson Falls in Sanders County, Montana. It was listed on the National Register of Historic Places in 1986.

It was built by contractors Christian & Gobelet for $5,000 and is a two-story brick building on a stone and mortar foundation. It has a shallow hipped roof. It has jail cells installed by the Paully Jail Company of St. Louis. With .

In 1984 it was the oldest surviving county building, and it was rented out to the Thompson Falls Historical Society.

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