Arcola Mills, Historic house in Washington County, United States.

Arcola Mills is a two-story wood-frame house with clapboard siding, built in 1847 with a rectangular footprint of 36 by 50 feet. Its east façade faces the St. Croix River and has a full-width porch topped by a deck reached from the upper floor. Greek Revival details include corner pilasters and broken pediments at the gable ends.

Two brothers established one of the first sawmills on the St. Croix River in 1847 and built this residence during Minnesota's early settlement period. This founding era shaped the region's role as a major lumber production center.

The Mower brothers built the town of Arcola around the mill for their employees, with a general store, a one-room schoolhouse, a boarding house, and shops for carpentry, blacksmithing, and boatbuilding. John Mower served in the 1854 Minnesota Territorial Legislature, and Mower County is named after him; Martin was a lifelong bachelor and managing owner of the St. Croix Boom Company.

Arcola Mills stands seven miles (11 km) north of Stillwater, Minnesota, in the unincorporated community of Arcola. The house and grounds are private property run by the Arcola Mills Historic Foundation, so visits depend on events and programs; confirm arrangements with the foundation before travelling. From 2010 to 2013 a volunteer visitor center for the St. Croix National Scenic Riverway operated here, but that partnership ended.

The mill's 34-foot-diameter water wheel turned in an enclosed wheelhouse over a spring-fed stream a few hundred feet north of the house; the 40-foot stone chimney is what remains. In 1856 the Mowers rebuilt the mill and switched to steam, doubling annual output, and did so again three years later with a new engine.