Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Firestone is a Statutory Town in Weld County, Colorado, United States. The population was 1,908 at the 2000 census.According to the United States Census Bureau in 2000, the town has a total area of 5.4 square miles (13.9 km²), of which, 5.3 square miles (13.8 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.74%) is water.