Chicago, Milwaukee and St. Paul Freight House

The Stillwater Commercial Historic District encompasses 11 downtown blocks in Stillwater, Minnesota, United States. It comprises 63 contributing properties built from the 1860s to 1940. It was listed as a historic district on the National Register of Historic Places in 1992 for its local significance in the themes of architecture and commerce. It was nominated for reflecting the economic and architectural diversity of a prosperous lumbering and manufacturing center.

The Mortimer Webster House is a historic house in Stillwater, Minnesota, United States, constructed 1865–1866. It is listed on the National Register of Historic Places in 1982 for having local significance in the themes of architecture and commerce. It was nominated for being one of the best examples of Italianate architecture in Stillwater, and for its association with Mortimer Webster, one of the town's notable early entrepreneurs.

The historic Washington County Courthouse in Stillwater, Minnesota, United States, is one of the oldest standing courthouses in Minnesota. It was the center of Washington County government for over a century, from the building's completion in 1870 until 1975. It was listed on the National Register of Historic Places in 1971 for having state-level significance in the themes of architecture and government/politics. It was nominated as Minnesota's oldest functioning courthouse and one of its few surviving examples of monumental public architecture from the mid-19th century.

The Moritz Bergstein Shoddy Mill and Warehouse are two historic industrial buildings in Stillwater, Minnesota, United States, in which Jewish German immigrant Moritz Bergstein conducted a recycling business circa 1890 to 1910 providing materials for mattresses. They were originally built in Oak Park Heights, Minnesota, around 1890 and were moved to neighboring Stillwater in 2012 to make way for construction of the St. Croix Crossing bridge. The property was listed on the National Register of Historic Places in 2008 for having local significance in the themes of industry and social history. They were nominated as a rare surviving embodiment of Minnesota's early Jewish immigrants and their frequent participation in the waste materials trade.

The Roscoe Hersey House is a historic house in Stillwater, Minnesota, United States, built 1879–1880. It was designed by architect George W. Orff in a mix of Eastlake and early Queen Anne style. Roscoe Hersey (?1841–1906) was a key figure in Stillwater's lumber and mercantile development, the son and local representative of Isaac Staples' Maine-based business partner Samuel F. Hersey. The house was listed on the National Register of Historic Places in 1982 for having local significance in the themes of architecture, commerce, and industry. It was nominated for its embodiment of the commercial success of the Hersey–Staples partnership, the ties between the St. Croix Valley and Bangor, Maine, and the peak of Stillwater's lumber industry.

Isaac Staples' Sawmill is a historic industrial property in Stillwater, Minnesota, United States, consisting of an 1850 stone powerhouse and a 1900 metal-clad factory. The property was listed on the National Register of Historic Places as St. Croix Lumber Mills—Stillwater Manufacturing Company in 1982 for its local significance in the theme of industry. It was nominated because the powerhouse is the only surviving industrial building associated with Isaac Staples (1816–1898), a major figure in Minnesota's early commercial development. The property now operates as a shopping mall with upper level apartments.

The Captain Austin Jenks House is a historic house in Stillwater, Minnesota, United States, built in 1871. Austin Jenks (d. 1902) was a prominent businessman and river pilot involved in timber rafting on the Mississippi and St. Croix Rivers. The house was listed on the National Register of Historic Places in 1982 for having local significance in the themes of architecture, industry, and transportation. It was nominated for its association with Jenks and the importance of water transportation to the region's foundational lumber industry.

The Ivory McKusick House is a historic house in Stillwater, Minnesota, United States, completed in 1872 for Ivory McKusick (1827–1906). It was listed on the National Register of Historic Places in 1982 for having local significance in the themes of architecture and commerce. It was nominated as a striking example of Second Empire architecture in the region and for its associations with a notable family in early Stillwater. McKusick had built his wealth via the lumber industry and government contracts during the Civil War. His older brother John had helped establish the first sawmill in the vicinity in 1843, named and platted the community that grew around it after his hometown in Maine, and served as its first mayor.

The Warden's House Museum is a historic house museum in Stillwater, Minnesota, United States. From 1853 to 1914 it was the official residence for the wardens of what began as the Minnesota Territorial Prison and became the Minnesota State Prison upon statehood in 1858. The Washington County Historical Society has operated the house since 1941, making it the second-oldest house museum in Minnesota. It was listed on the National Register of Historic Places in 1974 as the Minnesota Territorial/State Prison Warden's House for its state-level significance in the themes of architecture and social history. It was nominated for being the only surviving structure of the prison's Minnesota Territory period and the chief remnant of its statehood years.

The Minnesota Territorial Prison, later the Minnesota State Prison, was a prison in Stillwater, Minnesota, United States, in operation from 1853 to 1914. Construction of the prison began in 1851, shortly after Minnesota became a territory. The prison was replaced by the Minnesota Correctional Facility – Stillwater in nearby Bayport. Most of the original prison's structures were demolished in 1936, leaving only the 1853 Warden's House and a manual labor complex that had been constructed 1884–1898. The surviving factory buildings were listed on the National Register of Historic Places in 1982 for having state-level significance in the themes of industry and social history. The historic site, long since unused, was destroyed by arson on September 3, 2002. It was formally delisted from the National Register in 2005.

Nelson School is a former school building in Stillwater, Minnesota, United States, built in 1897. It was listed on the National Register of Historic Places in 1979 for having local significance in the themes of architecture and education. It was nominated for its Neoclassical/Georgian Revival architecture by Orff & Guilbert and for its status as the oldest surviving public school building in Stillwater.

The William Sauntry House and Recreation Hall is a historic property in Stillwater, Minnesota, United States, consisting of a late-nineteenth-century house and a 1902 addition styled after a Moorish palace. It was listed on the National Register of Historic Places in 1982 for its local significance in the themes of architecture and industry. It was nominated for its association with prosperous local lumberman William Sauntry (1845–1914) and for its fanciful recreation hall, one of Minnesota's best examples of a folly and a rare use of Moorish Revival architecture. Now in separate ownership, the recreation hall has been restored as a private home while the William Sauntry Mansion operates as a bed and breakfast.