Hyattstown is an unincorporated community in Montgomery County, Maryland, United States.^[1] It is located on Maryland Route 355 in upper Montgomery County, not far from the border with Frederick County.

Established in 1798 by founder Jesse Hyatt, the town featured the Hyattstown Inn, a one-room school-house, a butcher, a blacksmith, and other commercial venues. These historical commercial buildings are now private homes.

Quarries nearby supplied slate for roofing the old United States Capitol in Washington, D.C.^[2]

Hyattstown was the location of an 1862 Civil War artillery battle between General Nathaniel Prentice Banks' troops and General Stonewall Jackson's troops.^[2]

Hyattstown Christian Church, a Disciples of Christ congregation established in 1840, still operates today.^[3]

The old station building (ca. 1895) for the Rock Creek Railway and Kensington Railway streetcar lines was moved to Hyattstown from Chevy Chase in 1980.^[4]