Holly is an historic Statutory Town in Prowers County in southeastern Colorado, United States, near the Kansas border. Located four miles (6 km) from the Kansas border at an elevation of 3,392 feet (1,034 m), Holly is the least elevated town in Colorado. The population was 1,048 at the 2000 census.
Holly is located at 38°3′16″N 102°7′31″W / 38.05444°N 102.12528°W / 38.05444; -102.12528 (38.054520, -102.125398).
According to the United States Census Bureau, the town has a total area of 0.8 square miles (1.9 km²), all of it land.