Jefferson County, CO Demographics

What is the population of Jefferson County?

There are 740,235 residents in Jefferson County, with a median age of 40. Of this, 50.24% are males and 49.76% are females. US-born citizens make up 91.76% of the resident pool in Jefferson County, while non-US-born citizens account for 5.3%. Additionally, 2.95% of the population is represented by non-citizens. A total of 623,892 people in Jefferson County currently live in the same house as they did last year.
Y-o-Y Change
Total Population 740,235 -0.0%
Male Population 371,923 -0.1%
Female Population 368,312 0.0%
Male Population 50.24%
Female Population 49.76%
Y-o-Y Change
Median Age 40 0.2%
Citizen U.S. Born 679,203 -0.0%
Citizen not U.S. Born 39,215 0.6%
Not Citizen 21,817 -1.6%
Citizen U.S. Born 91.76%
Citizen not U.S. Born 5.3%
Not Citizen 2.95%
Y-o-Y Change
Moved from Abroad 2,827 -1.1%
Moved from Same County 39,259 -4.3%
Moved from Same State 45,000 -1.9%
Moved from Different State 22,399 2.7%
Same House as Last Year 623,892 0.3%
Moved from Abroad 0.39%
Moved from Same County 5.35%
Moved from Same State 6.14%
Moved from Different State 3.05%
Same House as Last Year 85.07%

What are the employment statistics in Jefferson County?

White-collar workers make up 85.61% of the working population in Jefferson County, while blue-collar employees account for 14.39%. There are also 96,254 entrepreneurs in Jefferson County (11.63% of the workforce); 557,180 workers employed in private companies (67.32%); and 109,890 people working in governmental institutions (13.28%).
Y-o-Y Change
White Collar 708,588 101.3%
Blue Collar 119,060 90.0%
White Collar 85.61%
Blue Collar 14.39%
Y-o-Y Change
Self Employees 96,254 106.5%
Private Companies 557,180 98.0%
Governmental Workers 109,890 103.2%
Not for Profit Companies 64,324 97.0%
Self Employees 11.63%
Private Companies 67.32%
Governmental Workers 13.28%
Not for Profit Companies 7.77%

How many households are there in Jefferson County?

There are a total of 309,494 households in Jefferson County, each made up of around 2 members. Family establishments represent 61.69% of these Jefferson County households, while non-family units account for the remaining 38.31%. Additionally, 26.05% of households have children and 73.95% of households are without children.
Y-o-Y Change
Total households 309,494 0.8%
Average People per Household 2 -17.6%
Family Households 190,940 -0.3%
Non-Family Households 118,554 2.8%
Family Households 61.69%
Non-Family Households 38.31%
Y-o-Y Change
Households with Children 80,629 -1.2%
Households without Children 228,865 1.6%
Households with Children 26.05%
Households without Children 73.95%

What are the median and average incomes in Jefferson County?

The average annual household income in Jefferson County is $143,939, while the median household income sits at $110,013 per year. Residents aged 25 to 44 earn $124,375, while those between 45 and 64 years old have a median wage of $127,819. In contrast, people younger than 25 and those older than 65 earn less, at $63,018 and $77,871, respectively.
Y-o-Y Change
Average Household Income $143,939 4.6%
Median Household Income $110,013 0.7%
People below Poverty Level 48,690 0.8%
People above Poverty Level 676,045 -0.0%

How many homeowners and renters are there in Jefferson County?

There are 324,500 housing units in Jefferson County, and the median year in which these properties were built is 1980. Of the 309,494 occupied housing units in Jefferson County, 69.3% are owner-occupied, while 30.7% have renters living in them. Meanwhile, properties bought with mortgages account for 70.76% of the units, and the median value of a home with a mortgage is $587,850. In general, housing costs reach $1,937 per month in Jefferson County.
Y-o-Y Change
Housing Units 324,500 1.1%
Median Year Built 1980 0.0%
Built in 1939 or Earlier 11,248 4.8%
Built between 1940 and 1949 6,254 0.7%
Built between 1950 and 1959 26,490 -2.2%
Built between 1960 and 1969 37,852 -1.3%
Built between 1970 and 1979 76,531 -0.8%
Built between 1980 and 1989 51,758 0.2%
Built between 1990 and 1999 48,031 -0.1%
Built between 2000 and 2009 34,056 2.5%
Built between 2010 and 2019 28,949 8.5%
Built in 2020 or Later 3,331 92.7%
Y-o-Y Change
Occupied Housing Units 309,494 0.8%
Owner Occupied 214,491 0.6%
Renter Occupied 95,003 1.5%
Owner Occupied 69.3%
Renter Occupied 30.7%
Y-o-Y Change
With Mortgage 151,774 -0.2%
Without Mortgage 62,717 2.3%
Median Value with Mortgage $587,850 6.2%
Median Value without Mortgage $563,400 3.0%
Median Housing Costs per Month $1,937 6.3%
With Mortgage 70.76%
Without Mortgage 29.24%

What is the level of education in Jefferson County?

Approximately 23.62% of the population in Jefferson County holds a high school degree (that's 142,070 residents), while 19.64% have attained a college certificate (118,114 locals) and 30.64% have a bachelor's degree (184,273 people).
Y-o-Y Change
No High School 9,265 -6.6%
Some High School 142,070 -2.4%
Some College 118,114 -18.0%
Associate Degree 43,606 -0.4%
Bachelor's Degree 184,273 2.6%
Graduate Degree 104,079 4.0%
No High School 1.54%
Some High School 23.62%
Some College 19.64%
Associate Degree 7.25%
Bachelor's Degree 30.64%
Graduate Degree 17.31%

What is the marital status of Jefferson County residents?

A total of 197,608 people in Jefferson County have never been married (which represents 31.22% of the total population), while 327,189 of them are wedded (51.69%). Separated and divorced residents are in smaller numbers, at 5,821 (0.92%) and 74,724 (11.81%), respectively.
Y-o-Y Change
Never Married 197,608 1.6%
Married 327,189 -0.5%
Separated 5,821 -6.2%
Widowed 27,587 -3.0%
Divorced 74,724 0.5%
Never Married 31.22%
Married 51.69%
Separated 0.92%
Widowed 4.36%
Divorced 11.81%

What are the most common means of transportation in Jefferson County?

The top three means of transportation people in Jefferson County use to get to work are: car, walking and bus or trolley bus. A total of 295,857 residents commute by car, 5,504 prefer going to work by walking and 4,935 by bus or trolley bus
Y-o-Y Change
Car 295,857 -4.2%
Bus or TrolleyBus 4,935 -16.5%
Railroad 402 -17.8%
Ferryboat 306 60.2%
Bicycle 2,580 3.1%
Motorcycle 546 -11.8%
TaxiCab 203 -23.7%
Walk 5,504 2.2%

What is the median and average household income in Jefferson County by zipcode?

ZipCode Population Number of Households Median Income Average Income
80002 20,975 9,451 $92,827 $114,531
80003 35,381 13,871 $82,754 $103,516
80004 34,580 14,548 $99,576 $122,778
80005 28,883 11,276 $136,360 $157,760
80007 18,290 6,482 $171,017 $207,085
80020 53,589 21,077 $114,039 $137,986
80021 35,562 16,402 $105,645 $126,845
80031 36,350 14,628 $106,244 $135,881
80033 26,841 12,650 $84,719 $110,340
80123 45,364 19,148 $106,731 $144,183

Methodology & Disclaimers

Demographic data shown in this section was gathered from the latest U.S. Census Bureau release, the 2023 American Community Survey. The information is updated yearly, as soon as new data is made available by the US Census Bureau.
No representation, guarantee or warranty is made as to the accuracy or completeness of information modified or aggregated for specific neighborhoods and/or zip codes.