Greeley is accessible from I-25 from the north or south, via "HWY 34". Upon reaching Greeley's westernmost border with Johnstown, the road splits into "HWY 34" which bisects the city east and west along the Southwest Greeley Business Center or to "HWY 34 business route" which turns into 10th street that runs east to 10th avenue and the Weld County Courthouse. The East Side of Greeley is also accessible north through Eaton, Ault and eventually, Cheyenne, WY and from the South through Platteville, Peckham, and Brighton on "HWY 85".
According to a July 2015 estimate by the U. S. Census Bureau, the population of the city is 100,883, and a 2014 population estimate made Greeley the 12th-most populous city in Colorado. Greeley is a major city of the Front Range Urban Corridor. The town was named after Horace Greeley, editor of the New-York Tribune, who came to Colorado in the 1859 Pike's Peak Gold Rush. It was founded as the Union Colony in 1869, an experimental utopian society, but the name was later changed in honor of Greeley. Governor Benjamin Harrison Eaton declared Greeley an official city on April 6, 1886. Greeley was built on farming and agriculture, but kept up with most modern technologies as they grew. Telephones were in town by 1883 with electric lights downtown by 1886. Automobiles were on the roads alongside horse drawn buggies by 1910. KFKA became one of the first radio stations to broadcast in the US in 1922 and the Greeley Municipal Airport was built in 1928.