Arthur Armstrong Denny (June 20, 1822 – January 9, 1899) was one of the founders of Seattle, Washington, the acknowledged leader of the pioneer Denny Party, and later the city's wealthiest citizen and a 9-term member of the territorial legislature. Seattle's former Denny Hill was named after him; it was flattened in a series of regrading projects and its former site is now known as the Denny Regrade. The city's Denny Way, however, is named not after Arthur Denny, but after his younger brother David Denny.