Fort Collins, Colorado is 11% larger than Aurora, Colorado.
Area: 125 km2 calculated
The City of Aurora is a Home Rule Municipality in the State of Colorado, spanning Arapahoe and Adams counties, with the extreme southeastern portion of the city extending into Douglas County. Aurora is one of the principal cities of the Denver-Aurora-Broomfield, CO Metropolitan Statistical Area. Wikipedia
Area: 138 km2 calculated
Fort Collins is a Home Rule Municipality in and the county seat of Larimer County, Colorado, United States. Situated on the Cache La Poudre River along the Colorado Front Range, Fort Collins is located 65 miles north of the Colorado State Capitol in Denver. Wikipedia