Once a budding frontier town just east of the state's capital, Aurora is Colorado's third largest city with a diverse population of more than 366,000. From agricultural outposts to a military bastion, Aurora established its foundation as a driving force in the west. Located in the eastern Aurora-Denver Metropolitan Area and covering 154 square miles, the city reaches into Arapahoe, Adams and Douglas counties. Tree-lined streets, open prairies, majestic views of the mountains, and ample open space and parks make Aurora neighborhoods a comfortable place to call home. More than 450 neighborhoods complete the fabric of the community.