Sterling is a home rule municipality that is the county seat and the most populous city of Logan County, Colorado, United States. The city population was 14,777 at the 2010 census.
Sterling is the largest city in Northeastern Colorado and the county seat of Logan County and the site of the domed Logan County courthouse, built in 1909.
A post office called Sterling has been in operation since 1874. The community was named for Sterling, Illinois, the native home of a railroad official.
Sterling is 128 miles (206 km) northeast of Denver, and is located on Interstate 76, on the 'eastern plains' of northeastern Colorado.
According to the United States Census Bureau, the city has a total area of 6.9 square miles (18 km2), all land.
According to the Köppen Climate Classification system, Sterling has a semi-arid climate, abbreviated "BSk" on climate maps.
As of the census of 2000, there were 11,360 people, 4,604 households, and 2,790 families living in the city. The population density was 1,653.1 people per square mile (638.4/km²). There were 5,171 housing units at an average density of 752.5 per square mile (290.6/km²). The racial makeup of the city was 90.75% Caucasian American, 0.75% African American, 0.79% Native American, 0.41% Asian, 0.08% Pacific Islander, 5.60% from other races, and 1.62% from two or more races. Hispanic or Latino of any race were 14.20% of the population.