The City of Boulder is located in the north-central section of the state of Colorado.
Boulder is the 11th most populous city in Colorado.
The city is located in and is the county seat of Boulder County and is a Home Rule Municipality.
Boulder was first settled in 1858 as Boulder City. The main campus of the University of Colorado is located in Boulder.
The city has a widespread reputation as a liberal city and is often referred to as the "The People's Republic of Boulder."
As of 2006, the population of Boulder was 91,685 and the population of the Boulder Metro Area was 280,440.
This link about Boulder, Colorado has more information.