Broomfield is a consolidated city and county in the U.S. state of Colorado. Broomfield has a consolidated city and county government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The population was 55,889 at the 2010 United States Census. Broomfield is the 16th most populous municipality and the 13th most populous county in Colorado.
The municipality of Broomfield was incorporated in 1961 in the southeastern corner of Boulder County. While it is unsure how it received its name, most researchers guess it's from the broomcorn grown in the area, a tall sorghum that farmers sold for use as brooms and whisk brooms. Over the next three decades, the city grew through annexations, many of which crossed the county line into three adjacent counties: Adams, Jefferson and Weld. In the 1990s, city leaders began to push for the creation of a separate county to avoid the inefficiencies of dealing with four separate court districts, four different county seats, and four separate county sales tax bases. It also had longstanding political differences with Boulder County which impelled it to separate. Broomfield reasoned that it could provide services more responsively under its own county government, and sought an amendment to the Colorado State Constitution to create a new county.