Dayton is an unincorporated community of about 10,000 located in Howard County, Maryland. Dayton is also the home to the annual Dayton Daze Parade that began in honor of Lenny Hobbs. The Hobbs family store was prominent in the cross-roads community. A postal office operated in the community from 21 July 1864 to present with brief stops in service during the Civil War. Dayton is in the 21036 zip code area and belongs to the 410 area code. Notable landmarks are the Crossroads Pub famed for their Maryland blue crabs and once owned by the Harp family (Harp's Pub), who also owned Harp's grocery store; the quaint Post Office that oozes Americana; the gas station that was once owned by a man named Lenny, where he used to pump gasoline for automobiles, clean the windshields of cars, and sell vanilla popsicles for 10 cents; and the "Rabbit" which is properly decorated for major holidays.[dubious– discuss]
In 2104, a zoning case prompted a large citizen reaction to allowing industrial mulching on agricultural preservation land.