Hidden Valley is a private residential community in Dearborn County, Indiana, United States.

The community and lake were built by land developer James Jacob Rupel,[6] who was active in the Greater Dayton area and Indiana for over 50 years and the former owner of Centre City Building and the Carillon House in downtown Dayton.

He was the developer of Hidden Valley Lake, several subdivisions near Rocky Fork State Park in Highland County, Ohio, the Valley Woods community in Greendale, Indiana, and the Country Squire Lakes community[7] in North Vernon, Indiana.

Hidden Valley is located in eastern Dearborn County within Miller and Lawrenceburg townships.

It is bordered to the south by the city of Greendale and to the east by the Ohio state line.