 According to the United States Census Bureau, the city has a total area of , of which of it is land and 0.04 square mile (0.1 km2) of it (0.37%) is water.Agoura Hills has a mountain called Ballard Mountain named after pioneer settler and freed slave John Ballard.The name of the mountain was officially changed from Negrohead to Ballard in a ceremony on February 20, 2010.