Platteville is a Statutory Town in Weld County, Colorado, United States.

The Fort St. Vrain Generating Station, originally a nuclear power plant and now operating as a natural gas powered electricity generating facility operated by Xcel Energy, is approximately one-quarter-mile northwest of Platteville.

According to the United States Census Bureau, Platteville has a total area of 2.527 square miles (6.54 km2), all of it land.

At the 2010 census there were 2,485 people, 951 households, and 935 families residing in Platteville.

There were 819 dwelling units at an average density of 555.1 per square mile (214.3/km2).