Westminster is a Home Rule Municipality in Adams and Jefferson counties in the U.S. state of Colorado. The city population was 106,114 on April 1, 2010 Census.
Gold discovered in the South Platte River Valley in 1858 brought national attention to the area that would become Westminster, Colorado. The promise of fortune and the Land Act of 1862 encouraged many settlers from the east to make Colorado their home instead of heading on to California. There is also evidence of Arapaho Indians near the Crown Point (Gregory Hill) area.In 1891, construction began on the Westminster Castle, which can still be seen as of today at West 83rd Avenue and Federal Boulevard. By 1911, the town had incorporated and was renamed one final time to Westminster, in honor of Westminster University.