Ruby is a ghost town in Santa Cruz County, Arizona, United States.

The Montana Mine produced gold, silver, lead, zinc and copper.

[2] On April 11, 1912 the mining camp's general store owner Julius Andrews established the post office.

[3] Between 1920 and 1922, the town of Ruby and the surroundings were the scene of three double homicides known as the Ruby Murders, which led to the largest manhunt in the history of the Southwest, which included the first airplane ever used in an Arizona manhunt.

Ruby's attractions today include approximately 25 buildings under roof, including the jail and houses, the school, the playground, mine machinery, buildings and mine workings.