The Arlington Post Office operated from August 16, 1887 to October 15, 2011.[4] The community's ZIP Code is 81021.[3]
Arlington Auxiliary Army Airfield
Three miles east of town is the site of the former Arlingtion Auxiliary Army Air Field #4,[5] one of many former Colorado World War II Army Airfields. The triangular shape of the runways is not only visible from the air, but also visible from the county road. The E/W runway still has large sections of asphalt and the vegetation has noticeable changes along the runway.