Mount Holly (also Mount Helley, Mount Holley, Pences Mills) is an unincorporated community in Warren County, in the U.S. state of Ohio. [1]
A sawmill and gristmill were built at Mount Holly as early as the 1810s. [2] Mount Holly was platted in 1833, and named after Mount Holly, New Jersey. [3] A post office called Mount Holly was established in 1843, and remained in operation until 1863. [4]
39°34′18″N 84°01′57″W / 39.57167°N 84.03250°W