population in delta co
Delta, Colorado. The City of Delta is the Home Rule Municipality that is the county seat and the most populous municipality of Delta County, Colorado, United States. The population was 8,915 at the 2010 census, up from 6,400 at the 2000 census. The United States Forest Service headquarters of the Grand Mesa, Gunnison, and Uncompahgre National Forests are located in Delta.