Census tract · Arapahoe County
Census Tract 861, Arapahoe County, Colorado
Census Tract 861, GEOID 08005086100, in Arapahoe County, Colorado, mostly within Centennial (70% of its census blocks). 4,939 residents in the ACS 2020-2024 5-year estimates (±523); the 2020 Census counted 4,986.
Residents, 2020-2024
4,939
±523 (90% margin)
2020 Census count: 4,986
Median household income
$125,652
±$22,559 (90% margin)
Arapahoe County: $101,087
Median home value
$581,300
±$23,899 (90% margin)
Arapahoe County: $561,200
Median gross rent
$3,026
±$278 (90% margin)
Arapahoe County: $1,891
Where is Census Tract 861?
Census Tract 861 is one of 161 census tracts in Arapahoe County, Colorado. It covers 0.73 square miles of land, 6,821 residents per square mile in 2020. Its GEOID, 08005086100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Centennial | 70% |
| Aurora | 6% |
5 census tracts border Census Tract 861: Tract 852 ($185,714), Tract 853 ($143,788), Tract 860.01 ($176,875), Tract 860.02 ($91,925) and Tract 862 ($134,209). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 861?
The 2020-2024 American Community Survey puts Census Tract 861's population at 4,939 (±523) in 1,590 households; the 2020 Census counted 4,986 residents and 1,573 housing units.
| Measure | Tract 861 | Centennial |
|---|---|---|
| Total population | 4,939 ±523 | 108,201 |
| Households | 1,590 ±142 | 42,233 |
| Average household size | 3.10 ±0.19 | 2.53 |
| Housing units | 1,611 ±144 | 43,291 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 861?
The median resident of Census Tract 861 is 37.8 years old; 27.5% are under 18 and 9.1% are 65 or older. The largest group is non-Hispanic white residents at 62.3%, then Hispanic or Latino residents (of any race) at 17.1%. 15.2% of residents were born outside the United States.
| Measure | Tract 861 | Centennial |
|---|---|---|
| Median age | 37.8 ±2.8 | 42.0 |
| Under 18 years | 27.5% ±2.9 pts | 21.8% |
| 65 years and over | 9.1% ±2.6 pts | 18.9% |
| Hispanic or Latino (any race) | 17.1% ±5.1 pts | 10.3% |
| White alone, not Hispanic | 62.3% ±6.6 pts | 74.1% |
| Black or African American alone, not Hispanic | 5.1% ±2.7 pts | 2.8% |
| Asian alone, not Hispanic | 11.2% ±5.4 pts | 6.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.5% ±0.6 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.2% |
| Two or more races, not Hispanic | 3.2% ±1.9 pts | 5.6% |
| Some other race alone, not Hispanic | 0.5% ±0.9 pts | 0.5% |
| Born outside the United States | 15.2% ±4.9 pts | 9.9% |
| Speak a language other than English at home (age 5+) | 22.5% ±6.6 pts | 12.5% |
| Civilian veterans (age 18+) | 5.5% ±2.4 pts | 7.2% |
| With a disability | 8.3% ±3.2 pts | 9.1% |
| No health insurance coverage | 4.4% ±3.7 pts | 3.8% |
| High school graduate or higher (age 25+) | 93.1% ±3.4 pts | 96.9% |
| Bachelor's degree or higher (age 25+) | 48.7% ±8.4 pts | 62.6% |
| Graduate or professional degree (age 25+) | 16.4% ±5.0 pts | 24.9% |
| Lived in the same house a year earlier | 89.3% ±5.7 pts | 89.2% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 861 earn?
Half of the 1,590 households in Census Tract 861 earn less than $125,652 a year (±$22,559), against $101,087 across Arapahoe County: 49th highest of the county's 159 tracts with a reliable estimate.
| Measure | Tract 861 | Centennial |
|---|---|---|
| Median household income | $125,652 ±$22,559 | $131,928 |
| Mean household income | $165,218 ±$26,941 | $167,169 |
| Per capita income | $55,238 ±$8,956 | $65,940 |
| People below the poverty line | 2.2% ±1.6 pts | 3.3% |
| Children under 18 below the poverty line | 0.0% ±3.2 pts | 2.9% |
| Households receiving SNAP | 4.1% ±2.9 pts | 2.7% |
| Households with a computer | 99.4% ±1.0 pts | 98.7% |
| Households with a broadband subscription | 96.2% ±3.1 pts | 96.9% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 861?
Owners occupy 83.1% of Census Tract 861's occupied homes and renters 16.9%. The median owner-occupied home is valued at $581,300 by its owner (±$23,899). The median renter pays $3,026 a month including utilities, and 35.0% of renters pay 35% or more of their income on rent.
| Measure | Tract 861 | Centennial |
|---|---|---|
| Median home value (owner-occupied) | $581,300 ±$23,899 | $658,100 |
| Median gross rent | $3,026 ±$278 | $2,148 |
| Renters paying 35% or more of income on rent | 35.0% ±21.6 pts | 38.0% |
| Median monthly owner costs, with a mortgage | $2,294 ±$227 | $2,672 |
| Owner-occupied homes | 83.1% ±6.0 pts | 80.6% |
| Renter-occupied homes | 16.9% ±6.0 pts | 19.4% |
| Housing units | 1,611 ±144 | 43,291 |
| Single-family detached homes | 95.5% ±2.8 pts | 73.4% |
| Mobile homes | 0.0% ±2.6 pts | 0.2% |
| Built 2020 or later | 1.3% ±2.0 pts | 1.6% |
| Built 2010 to 2019 | 2.2% ±2.1 pts | 5.9% |
| Built 1939 or earlier | 0.0% ±2.6 pts | 0.5% |
| Households with no vehicle | 0.6% ±1.1 pts | 2.9% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 861 get to work?
69.6% of Census Tract 861's workers drive alone and 17.6% work from home. The average trip to work takes 32.1 minutes. The unemployment rate in 2020-2024 averaged 4.2%.
| Measure | Tract 861 | Centennial |
|---|---|---|
| In the labor force (age 16+) | 79.9% ±4.8 pts | 69.5% |
| Unemployment rate | 4.2% ±2.7 pts | 4.6% |
| Drove alone to work | 69.6% ±5.4 pts | 63.6% |
| Carpooled | 7.8% ±4.1 pts | 5.7% |
| Public transportation | 2.8% ±2.6 pts | 0.9% |
| Walked | 0.3% ±0.5 pts | 1.6% |
| Worked from home | 17.6% ±4.5 pts | 26.9% |
| Mean travel time to work | 32.1 min ±3.7 | 25.9 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 861 compare with the other tracts in Arapahoe County?
Among Arapahoe County's tracts with a reliable estimate, Census Tract 861 ranks as shown below (1 = highest).
| Measure | In Arapahoe County | In Centennial |
|---|---|---|
| Population | 45th of 160 | 11th of 30 |
| Residents per square mile | 48th of 161 | 3rd of 30 |
| Median household income | 49th of 159 | 21st of 30 |
| Per capita income | 69th of 160 | 25th of 30 |
| Median home value | 69th of 158 | 24th of 29 |
| Median gross rent | 12th of 146 | 5th of 24 |
| Bachelor's degree or higher | 81st of 161 | 29th of 30 |
| Median age | 76th of 160 | 25th of 30 |
| Owner-occupied share | 51st of 159 | 19th of 29 |
The tracts next to it on Arapahoe County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 56.30 | 46th | $131,233±$15,855 · within the margin of this tract |
| Tract 847 | 47th | $128,020±$21,449 · within the margin of this tract |
| Tract 68.64 | 48th | $126,575±$23,255 · within the margin of this tract |
| Tract 861 | 49th | $125,652±$22,559 |
| Tract 56.23 | 50th | $125,625±$22,121 · within the margin of this tract |
| Tract 56.14 | 51st | $123,625±$30,702 · within the margin of this tract |
| Tract 56.28 | 52nd | $123,155±$15,908 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 861?
1 of the 18 figures for Census Tract 861 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections