Antietam is an unincorporated community and census-designated place in Washington County, Maryland, United States.

[4] It is the site of Antietam Iron Furnace Site and Antietam Village, added to the National Register of Historic Places in 1975.

[5][6] According to the U.S. Census Bureau, the community has an area of 0.153 square miles (0.40 km2), all land.

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