Deadwood was home to 1,270 people at the time of the 2010 Census, down 7.9 percent from 2000. With a median age of 48, tthe community has 334.2 people per square mile. The majority (94.9 percent) of people in Deadwood are white. American Indians constitute 1.8 percent of Deadwood’s population and 3.4 percent are Hispanic. In 2010, 2.0 percent of the population reported belonging to more than one race.

Of the 661 households in Deadwood in 2010, 16 percent included families with children. Married couples with children accounted for nearly half of these families. Single mothers caring for their own children represented another 31 households, or just under a third of families with children.