Atwood is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Logan County, Colorado, United States. The CDP is a part of the Sterling, CO Micropolitan Statistical Area. The Atwood post office has the ZIP Code 80722. At the United States Census 2020, the population of the Atwood CDP was 138.

Logan County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 21,528. The county seat is Sterling. The county was named for General John A. Logan.