Waldorf, Maryland General Assembly of Maryland by an act changed the name to "Waldorf" in honor of William Waldorf Astor (1848–1919), the great-grandson of John Jacob Astor (1763–1848), who was born in Walldorf, Palatinate, Germany. On July 29, 1908, the city of Plumb Valley in Waseca County, Minnesota, changed its name to Waldorf after Waldorf, Maryland. Once a tobacco market village, Waldorf came to prominence in the 1950s as a gambling destination after slot machines were legalized in Charles County in 1949. The boom lasted until 1968 when gambling was once again outlawed. Its subsequent substantial growth as a residential community began
John Jacob Astor purchased ten tons of Turkish opium, then shipped the contraband item to Canton on the packet ship "Macedonian". Astor later left the China opium trade and sold solely to the United Kingdom. Astor's business rebounded in 1817 after the U.S. Congress passed a protectionist law that barred foreign fur traders from U.S. territories. The American Fur Company came to dominate trading in the area around the Great Lakes. John Jacob Astor had a townhouse at 233 Broadway in Manhattan and a country estate, Hellgate in Northern New York City. In 1822, Astor established the Robert Stuart House on Mackinac Island