Mudhouse Mansion was located in Fairfield County, Ohio, United States, just east of the city of Lancaster. It was variously said to have been built sometime between 1840–1850, in the 1870s, or around 1900; the Second Empire style makes the 1870s seem most likely. It was demolished September 21, 2015.
In 1839 or 1852 (year uncertain), Christian and Eleanor Rugh purchased the property from Abraham Kagy and Henry Byler. In 1919, the property was sold to Henry and Martha Hartman. Henry Hartman died in 1930 and the property was inherited by Lulu Hartman (m. Oren Mast), his daughter. Her descendants still own the land today, and locally the home was long known as the "Hartman Place." The same building is described as the "Rugh-Mast" house in the book Heritage of Architecture and Arts, Fairfield County, Ohio by Ruth W. Drinkle.
Like many abandoned properties, it had developed a reputation as a haunted house. Among the legends: after the Civil War, a government official still kept slaves, locking them up at night. One night, one of the slaves dug himself free and killed the entire family (exceedingly unlikely, as Ohio was not a slave state). Another story sets the mass-murder or mass-suicide (by hanging) of a more recent family there. Still, other local yarns assert that the house is the original home of the Bloody Mary of children's lore, and that the house was haunted by a woman who killed her children, or by a woman whose husband killed their children, or by all of the parties involved in the tragedy.
The home had not been regularly occupied since the 1930s, though transients have lived there, including, reputedly, a group of hippies in the 1960s, and the once-grand structure had been damaged by fires and vandalism. The home itself was a rather beautiful, brick, Second Empire-style house built in the mid-19th century. Although the mansion was a favored destination for legend tripping, the owner is said to prosecute trespassers.
As of September 21st, 2015, the Mudhouse Mansion was in the process of being demolished by the property owners, the Mast family. 
- "Mudhouse Mansion". Forgotten Ohio. 2003-07-17. Retrieved 2013-07-30.
- "RootsWeb: OHFAIRFI-L Re: [OHFAIRFI-L] Mudhouse". Listsearches.rootsweb.com. 2001-10-04. Retrieved 2013-07-30.
- "Lancaster, OH – Mudhouse Mansion – Haunted by Slaves and Slaveowners". Roadsideamerica.com. 2007-09-13. Retrieved 2013-07-30.
- "Mudhouse Mansion". Grave Addiction. 2003-07-17. Retrieved 2013-07-30.
- "Mudhouse Mansion demolished". Lancaster Eagle Gazette. 2015-09-21. Retrieved 2015-09-21.
- Mudhouse Mansion Urban Legend
- Forgotten Ohio - Mudhouse Mansion
- Photographs of Mud House Mansion on Unearthed Ohio