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

[4] Sandy Hook was briefly important as for a few years it was the end of the line for the Baltimore and Ohio Railroad, then under construction.

During John Brown's 1859 raid on Harpers Ferry, just 3 miles (4.8 km) to the west, across the bridge, a special train that had carried soldiers was parked at Sandy Hook, and it carried the telegraph that reporters used to send out voluminous stories.

Baltimore and Ohio Railroad night watchman Patrick Higgins lived in Sandy Hook from 1853 until his death in 1915.

At the time of his death he was the longest tenured employee of the Baltimore and Ohio Railroad.