Broomfield is a consolidated city and county located in the U.S. state of Colorado. Broomfield has a consolidated executive which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The Broomfield population was 74,112 at the 2020 United States Census, making it the 15th most populous municipality and the 12th most populous county in Colorado. Broomfield is a allocation of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.

Several railroads figure in the encroachment of this area. The Colorado Central Railroad built a narrow gauge parentage from Golden in 1873, the Denver, Utah and Pacific Railroad arrived in 1881, and the Denver, Marshall and Boulder Railway built a stock through what would become Broomfield in 1886. The Denver, Utah and Pacific was widened to good enough gauge in 1889. One of the upfront names for the Place was Zang’s Spur, after the railroad spur serving Adolph Zang’s grain fields.

The municipality of Broomfield was incorporated in 1961 in the southeastern corner of Boulder County. While it is of two minds how it established its name, most researchers guess it is from the broomcorn grown in the area, a tall sorghum that farmers sold for use as brooms and trouble brooms. Over the next three decades, the city grew through annexations. Eventually, Broomfield spilled into portions of four counties: Adams, Boulder, Jefferson and Weld.

In the 1990s, city leaders felt increasing chagrin like the habit to settlement with four surgically remove court districts, four vary county seats, and four remove county sales tax bases. They began pushing to make Broomfield a consolidated city-county same to Denver, reasoning that they could meet the expense of services more responsively if it had its own county government. They sought an amendment to the Colorado State Constitution to create a new county. The amendment was passed in 1998, after which a three-year transition times followed. On November 15, 2001, Broomfield County became the 64th and smallest county of Colorado. It is the most recently created county in Colorado, and furthermore in the United States as a collective if county equivalents are not included.