Buildings and structures completed in 1840

The Hockley Mill Farm, also known as Mt. Pleasant Mills and Frank Knauer Mill, is an historic home and grist mill which is located in Warwick Township, Chester County, Pennsylvania.

Hibernian Hall is a historic meeting hall and social venue at 105 Meeting Street in Charleston, South Carolina, United States. Built in 1840, it is Charleston's only architectural work by Thomas Ustick Walter, and a fine example of Greek Revival architecture. The wrought iron gates were made by Christopher Werner, a German-American master ironworker in Charleston.

The Cherie Quarters Cabins were two single-story slave cabins which were the only two surviving of thirty or more original cabins on the River Lake (or Riverlake) plantation. Wood-frame buildings supported by brick piers, they were listed on the National Register of Historic Places in 1995. A similar cabin was the childhood home of African-American novelist Ernest J. Gaines.

The Fanckboner-Nichols Farmstead is a farmhouse and associated buildings located at 5992 West VW Avenue in Prairie Ronde Township, Michigan. It was listed on the National Register of Historic Places in 2007.

The Booth-Dunham Estate is a single-family home located at 6059 South Ninth Street Texas Charter Township near Kalamazoo, Michigan. It was listed on the National Register of Historic Places in 1998.

The Stoner Creek Rural Historic District, in Bourbon County, Kentucky near Paris, Kentucky, is a 22,000 acres (89 km) historic district which was listed on the National Register of Historic Places in 2001.

The Armstrong House is a single-story Greek Revival-style historic house built around 1840 and located on Broad St. in Lumpkin, Georgia, United States. It was listed on the National Register of Historic Places in 1982.

The Dautreuil House, at 517 E. Bridge St. in St. Martinville, Louisiana, was built around 1840. It was listed on the National Register of Historic Places in 1995.

The Sidney T. Smith House was a farmhouse located at 12880 Michigan Avenue in Grass Lake, Michigan. It was listed on the National Register of Historic Places in 1972. However, the house was destroyed by fire in 1972, and removed in 1978 after its demolition.

The John Kinzer House is a historic house in Carmel, Indiana. It was built in the 1840s by John D. Kinzer, a settler who lived here with his wife and their seven children. Kinzer purchased the land from the federal government and initially built a much more modest cabin which still stands next to the main house; the cabin was built in 1828. The main house was designed in the Federal architectural style, with two stories and two chimneys. It has been listed on the National Register of Historic Places since September 5, 1975.