Gum Grove, Ohio

Middleboro is an unincorporated community in Warren County, in the U.S. state of Ohio.

Hicks is an unincorporated community in Warren County, in the U.S. state of Ohio.

Washington Township is one of the eleven townships of Warren County, Ohio, United States. Located in the east-central part of the county, it is the only one of the eleven that does not contain a municipality. The population was 2,752 at the 2020 census.

Edwardsville is an unincorporated community in Warren County, in the U.S. state of Ohio. Edwardsville is the oldest community in Harlan Township.

Osceola is an unincorporated community in Warren County, in the U.S. state of Ohio.

Sugar Run is a stream in the U.S. state of Ohio. It is a tributary to Todd Fork. Sugar Run most likely was named for the sugar maple timber along its course. A variant name was "Sugar Creek".

Hammel and Millgrove are extinct towns in western Warren County, Ohio, United States. They are located along the Little Miami River, about 2 miles (3 km) south of Fort Ancient and 1 mile (1½ km) north of Roachester at the Strout Road crossing of the river. Hammel lies on the eastern shore of the river, in southwestern Washington Township, and Millgrove lies on the western shore of the river, in northeastern Salem Township. Hammel had its start in the 1840s when the railroad was extended to that point. The community was named after its founder. The GNIS considers Hammel to be a ghost town.

Cowen Run is a stream in the U.S. state of Ohio.Cowen Run was named in honor of a local family. A variant name was "Cowens Run".

Fort Ancient (33 WA 2) is a Native American earthworks complex located in Washington Township, Warren County, Ohio, along the eastern shore of the Little Miami River about seven miles (11 km) southeast of Lebanon on State Route 350. The site is the largest prehistoric hilltop enclosure in the United States with three and one-half miles (18,000 ft) of walls in a 100-acre (0.40 km2) complex. Built by the Hopewell culture, who lived in the area from the 200 BC to AD 400, the site is situated on a wooded bluff 270 feet (82 m) above the Little Miami. It is the namesake of a culture known as Fort Ancient who lived near the complex long after it was constructed. Maintained as a state historical park, the site was designated a National Historic Landmark for its significance. The State of Ohio purchased the land and made it Ohio's first state park in 1891. In addition, this is part of the Hopewell Ceremonial Earthworks, one of 14 sites nominated in January 2008 by the U.S. Department of the Interior for potential submission by the United States to the UNESCO World Heritage List. It was officially designated a World Heritage Site in September 2023 together with the earthworks at Hopewell Culture National Historical Park and the Newark Earthworks.

Roachester is an unincorporated community in Warren County, Ohio, United States. Roachester is located at the junction of Ohio State Route 3 and Ohio State Route 123, 1.6 miles (2.6 km) east of Morrow.

Blackhawk is an unincorporated community in Warren County, in the U.S. state of Ohio. A variant spelling is "Black Hawk".

The Crossed Keys Tavern, also known as the Cross Keys Tavern is a historic stone building located in Turtlecreek Township near Lebanon, Ohio. It is across the Little Miami River from the former Fort Ancient village. Built in 1802, it was operated as a tavern from 1809–1820.On October 21, 1976, it was added to the National Register of Historic Places.