Broomfield is a consolidated city and county located in the U.S. state of Colorado. It has a consolidated government which operates under Article XX, Sections 10–13 of the Constitution of the State of Colorado. Broomfield's 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 part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range urban corridor.

Several railroads figure in the development of this area. The Colorado Central Railroad built a narrow-gauge line from Golden in 1873, the Denver, Utah and Pacific Railroad arrived in 1881, and the Denver, Marshall and Boulder Railway built a line through what is now Broomfield in 1886. The Denver, Utah and Pacific was widened to standard gauge in 1889. One of the early names for the area 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. Researchers speculate the city was named for the sorghum grown in the area, also known as broomcorn, which farmers sold to manufacturers of brooms and whisk brooms.

In the 1990s, after three decades of annexations, Broomfield had spilled into Adams, Jefferson, and Weld counties in addition to Boulder. City leaders felt increasing chagrin with the need to deal with four different county governments, four separate county sales tax bases, and four separate court districts. They began pushing to make Broomfield a consolidated city-county similar to Denver, reasoning that they could provide services more responsively if Broomfield had its own county government.

The city sought an amendment to the state constitution to create a new county. The amendment was passed in 1998, after which a three-year transition period followed.

On November 15, 2001, Broomfield County became the 64th and smallest county of Colorado. It is the newest county in Colorado (and in the entire United States, if county equivalents are not included).

Broomfield is located midway between downtown Denver and Boulder along U.S. Route 36.

The elevation of Broomfield is 5,348 feet (1,630 m). At the 2020 United States Census, Broomfield had a total area of 21,471 acres (86.890 km), including 371 acres (1.503 km) of water. It is the smallest county by area in Colorado, and the 5th smallest in the United States.

Rocky Mountain Metropolitan Airport, formerly known as the Jefferson County (Jeffco) Airport, is located in Broomfield.

• Interstate 25
• U.S. Highway 36 (Denver–Boulder Turnpike)
• U.S. Highway 85
• U.S. Highway 287
• State Highway 7
• State Highway 121
• State Highway 128
• E-470 (tollway)
• Northwest Parkway (tollway)

• Weld County — northeast
• Adams County — southeast
• Jefferson County — southwest
• Boulder County — northwest

According to the Köppen climate classification system, Broomfield has a cold semi-arid climate (BSk). According to the United States Department of Agriculture, it is in plant hardiness zone 6a with an average annual extreme minimum temperature of −9.4 °F (−23.0 °C).

According to the A. W. Kuchler U.S. potential natural vegetation types, Broomfield would have a Bouteloua/buffalograss (65, commonly known as grama grass) vegetation type and a shortgrass prairie (17) vegetation form.

Historical population

Census	Pop.	Note	%±
1960	4,535		—
1970	7,261		60.1%
1980	20,730		185.5%
1990	24,638		18.9%
2000	38,272		55.3%
2010	55,889		46.0%
2020	74,112		32.6%
2023 (est.)	76,860		3.7%
U.S. Decennial Census

Broomfield is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area.

The 2020 census estimated there were 74,112 people living in Broomfield. The population density was 2,248 people per square mile (868 people/km), making it the second most densely populated county in Colorado behind Denver. The racial makeup of the city was 76.0% White, 6.9% Asian, 1.3% African American, 0.6% Native American, 0.1% Pacific Islander, and 10.9% from two or more races; additionally, 13.4% were Hispanic or Latino and, by 2023, 8.8% were foreign-born.

In 2023, there were 33,563 households, of which 48.0% were married couples living together, 11.4% were cohabiting couple households, 18.7% had a male householder with no spouse/partner present, and 21.9% had a female householder with no spouse/partner present. 22.5% of households had one or more people under 18 years, and 25.6% of households had one or more people 65 years or older. The average household size was 2.28 people, and the average family size was 2.90 people.

In 2023, age distribution figures showed 20.2% of residents under the age of 18 and 16.5% age 65 years or older. The median age was 37.9 years and females made up 49.1% of the population.

In 2023, the median household income in Broomfield was $112,139 and the median family income was $130,920. The per capita income for the city was $59,679, with 5.3% of the population living below the poverty line and 2.7% without health care coverage. By 2018–2022 estimates, Broomfield had the 3rd highest median household income among Colorado counties and the 40th highest in the United States; for families, the median income was the 2nd highest among Colorado counties and the 18th highest in the United States.

In 2023, the educational attainment of residents over age 25 included 97.0% being high school graduates (or higher), 58.8% holding a bachelor's degree (or higher), and 25.6% holding a graduate or professional degree.

When the county was formed in 2001, it was a swing county, and it has voted for the winner of the national popular vote in each presidential election and the winner of Colorado's electoral votes. In the 2012 election, incumbent president and Democrat Barack Obama defeated Republican Mitt Romney by roughly five percentage points. In recent years, the county has trended towards the Democratic Party, in line with the rest of the Denver area. In 2016, it voted decisively for Hillary Clinton. Joe Biden won the county by an even larger margin in 2020.

As of October 1, 2024, among 54,208 active registered voters in Broomfield, 15,049 were Democrats, 10,169 were Republicans, and 28,048 were not affiliated with any party.

United States presidential election results for Broomfield, Colorado

Year	Republican		Democratic		Third party(ies)
	No.	%	No.	%	No.	%
2020	16,295	34.94%	29,077	62.35%	1,260	2.70%
2016	14,367	38.12%	19,731	52.35%	3,591	9.53%
2012	15,008	45.67%	16,966	51.62%	891	2.71%
2008	12,757	43.31%	16,168	54.89%	528	1.79%
2004	12,007	51.68%	10,935	47.06%	293	1.26%

In the 1990s, Broomfield and other area suburbs experienced tremendous economic growth, much of it focused in technology.

The Flatiron Crossing Mall is a large shopping and entertainment center, anchored by Dick's Sporting Goods, Macy's, and Forever 21.

Crocs, Vail Resorts, MWH Global, Flatiron Construction, Webroot, Noodles & Company, WhiteWave Foods and Mrs. Fields are headquartered in Broomfield.

According to Broomfield's 2020 Comprehensive Annual Financial Report, the top employers in the city are:

#	Employer	# of Employees
1	Lumen Technologies	1,850
2	Oracle	1,620
3	SCL Health	1,530
4	Hunter Douglas	980
5	City and County of Broomfield	795
6	Vail Resorts	740
7	TSYS	580
8	DanoneWave Foods	570
9	Broadcom Inc.	500
10	VMWare	465

The Broomfield Enterprise is the local newspaper. KBDI-TV, the secondary PBS member station for the Denver area, is licensed to Broomfield.

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Broomfield's recreational opportunities include the Paul Derda Recreation Center and pool, athletic fields, courts and rinks and open space and trails.

Broomfield has an extensive trail system that connects the various lakes and parks. A scenic trail connects the Stearns Lake and the Josh's Pond memorial on the west side of town. Broomfield also has a 9/11 memorial containing a piece of a steel beam from one of the towers.

Broomfield also has a skate park with many different features such as bowls, a large half-pipe and several "street" obstacles.

The Broomfield Community Center (renovated in 2020) offers a wide variety of fitness classes, senior activities, and hosts swim meets and kids' camps for the whole city and county.

A few of the favorite outdoor activities of Broomfield residents are tennis and golf. There are a large number of golf courses and tennis courts open to the public. Broomfield Community Center also hosts other Denver metro cities in their center, mainly for pickleball games and tournaments.

Broomfield's leadership includes the Mayor, the Mayor Pro Tem, the City and County Manager, Attorney, and City Council members.

• Mayor — Guyleen Castriotta
• Mayor Pro-Tem — Deven Shaff

• City and County Manager — Jennifer Hoffman
• City and County Attorney — Nancy Rodgers

• Ward 1
  • Kenny Nguyen
  • James Marsh-Holschen
• Ward 2
  • Paloma Delgadillo
  • Austin Ward
• Ward 3
  • Jean Lim
  • Deven Shaff
• Ward 4
  • Bruce Leslie
  • Laurie Anderson
• Ward 5
  • Heidi Henkel
  • Todd Cohen

Broomfield operates as a consolidated city-county. The city council acts simultaneously as the board of county commissioners, and the police chief is simultaneously the county sheriff. The Broomfield Police Department performs all of the duties that would normally be performed by a county sheriff's office, including operating the county jail (detention center), providing security and bailiff services for the Broomfield Municipal, County, and District Courts and the Combined Courts Building, and providing civil process in the county. The police chief can be hired or fired at will by the city council, which makes Broomfield's sheriff, along with Denver's, the only non-elected sheriffs in the state.

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Since Broomfield used to be divided among four counties, students living in the city were served by the separate school districts for their county. While the city is now united within one county, it is still separated among 6 school districts:

• Boulder Valley School District
• 27J Schools
• Weld County School District RE-8
• Jefferson County Public Schools
• St. Vrain Valley School District
• Adams 12 Five Star Schools

Of Colorado's 10 largest school districts, 4 (Jefferson County, Adams 12 Five Star, St. Vrain Valley, and Boulder Valley) have sections in Broomfield.

Broomfield features two large public high schools (Broomfield High School and Legacy High School), two public middle schools, and eight public elementary schools. There are four private schools: Brightmont Academy, a 1-to-1 school for all grade levels; Broomfield Academy, with an academic preschool, an elementary school, and a middle school; Holy Family, a Catholic high school; and Nativity of Our Lord Parish, a Catholic elementary school. Broomfield also contains two K–12 charter schools — Prospect Ridge Academy and Front Range Academy, which has two Broomfield campuses.

Notable individuals who were born in or have lived in Broomfield (or both) include:

• Mark Boslough, physicist
• Drew Brown, musician, guitarist for OneRepublic and Debate Team
• Dianne Primavera, 50th Lieutenant Governor of Colorado and former member of the Colorado House of Representatives
• Anna Prins, basketball center
• Vince Russo, pro wrestling personality and podcaster
• Steve Schmuhl, swimmer
• Mike Wilpolt, football wide receiver, defensive back, coach
• Cat Zingano, bantamweight MMA fighter

Broomfield has a sister city, as designated by Sister Cities International:

• Ueda, Nagano Prefecture, Japan

• 2013 Colorado floods
• Front Range Urban Corridor
• Jefferson Parkway
• Northwest Parkway
• Rocky Flats National Wildlife Refuge

• City and County of Broomfield website
• CDOT map of the City and County of Broomfield
• History Colorado website