Census tract · Boulder County
Census Tract 123, Boulder County, Colorado
Census Tract 123, GEOID 08013012300, in Boulder County, Colorado, entirely within Boulder. 7,025 residents in the ACS 2020-2024 5-year estimates (±247); the 2020 Census counted 7,059.
Residents, 2020-2024
7,025
±247 (90% margin)
2020 Census count: 7,059
Median household income
$33,750
±$3,691 (90% margin)
Boulder County: $103,994
Median home value
not published
Boulder County: $756,300
Median gross rent
$1,548
±$114 (90% margin)
Boulder County: $1,966
Where is Census Tract 123?
Census Tract 123 is one of 78 census tracts in Boulder County, Colorado. It covers 0.55 square miles of land, 12,881 residents per square mile in 2020. Its GEOID, 08013012300, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Boulder | 100% |
5 census tracts border Census Tract 123: Tract 122.04 ($51,583), Tract 122.06 ($34,183), Tract 124.01 ($38,961), Tract 125.07 ($53,971) and Tract 126.10 ($23,590). 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 123?
The 2020-2024 American Community Survey puts Census Tract 123's population at 7,025 (±247) in 610 households; the 2020 Census counted 7,059 residents and 603 housing units.
| Measure | Tract 123 | Boulder |
|---|---|---|
| Total population | 7,025 ±247 | 106,433 |
| Households | 610 ±102 | 44,432 |
| Average household size | 2.02 ±0.20 | 2.12 |
| Housing units | 777 ±97 | 47,465 |
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 123?
The median resident of Census Tract 123 is 19.5 years old. The largest group is non-Hispanic white residents at 66.5%, then non-Hispanic Asian residents at 15.7%. 15.1% of residents were born outside the United States.
| Measure | Tract 123 | Boulder |
|---|---|---|
| Median age | 19.5 ±0.2 | 28.8 |
| Under 18 years | 3.1% ±1.3 pts | 11.8% |
| 65 years and over | 0.0% ±0.6 pts | 12.7% |
| Hispanic or Latino (any race) | 9.8% ±2.6 pts | 10.7% |
| White alone, not Hispanic | 66.5% ±3.9 pts | 78.0% |
| Black or African American alone, not Hispanic | 2.4% ±1.7 pts | 1.0% |
| Asian alone, not Hispanic | 15.7% ±3.7 pts | 5.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.1 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.3% ±0.4 pts | 0.0% |
| Two or more races, not Hispanic | 5.3% ±1.8 pts | 4.4% |
| Some other race alone, not Hispanic | 0.0% ±0.6 pts | 0.3% |
| Born outside the United States | 15.1% ±3.4 pts | 10.8% |
| Speak a language other than English at home (age 5+) | 24.5% ±3.2 pts | 14.9% |
| Civilian veterans (age 18+) | 0.1% ±0.1 pts | 2.7% |
| With a disability | 6.4% ±2.0 pts | 7.6% |
| No health insurance coverage | 2.7% ±1.8 pts | 3.4% |
| High school graduate or higher (age 25+) | 100.0% ±4.4 pts | 97.3% |
| Bachelor's degree or higher (age 25+) | 89.4% ±6.1 pts | 76.8% |
| Graduate or professional degree (age 25+) | 55.2% ±11.1 pts | 40.4% |
| Lived in the same house a year earlier | 33.9% ±5.2 pts | 65.9% |
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 123 earn?
Half of the 610 households in Census Tract 123 earn less than $33,750 a year (±$3,691), against $103,994 across Boulder County: 74th highest of the county's 76 tracts with a reliable estimate. 30.9% of residents live below the poverty line.
| Measure | Tract 123 | Boulder |
|---|---|---|
| Median household income | $33,750 ±$3,691 | $87,493 |
| Mean household income | $49,188 ±$7,906 | $148,050 |
| Per capita income | $9,459 ±$1,226 | $63,074 |
| People below the poverty line | 30.9% ±10.2 pts | 21.5% |
| Children under 18 below the poverty line | 8.4% ±13.4 pts | 9.1% |
| Households receiving SNAP | 6.4% ±6.1 pts | 5.5% |
| Households with a computer | 100.0% ±6.7 pts | 99.0% |
| Households with a broadband subscription | 81.3% ±7.4 pts | 95.6% |
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 123?
The median renter pays $1,548 a month including utilities, and 67.1% of renters pay 35% or more of their income on rent.
| Measure | Tract 123 | Boulder |
|---|---|---|
| Median gross rent | $1,548 ±$114 | $2,018 |
| Renters paying 35% or more of income on rent | 67.1% ±9.7 pts | 58.4% |
| Owner-occupied homes | 1.3% ±1.5 pts | 47.2% |
| Renter-occupied homes | 98.7% ±1.5 pts | 52.8% |
| Housing units | 777 ±97 | 47,465 |
| Single-family detached homes | 0.8% ±0.9 pts | 38.7% |
| Mobile homes | 0.0% ±5.3 pts | 2.0% |
| Built 2020 or later | 0.0% ±5.3 pts | 1.4% |
| Built 2010 to 2019 | 8.1% ±6.7 pts | 8.1% |
| Built 1939 or earlier | 1.2% ±1.0 pts | 7.5% |
| Households with no vehicle | 24.4% ±8.7 pts | 9.1% |
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 123 get to work?
17.1% of Census Tract 123's workers drive alone and 29.2% work from home. The average trip to work takes 15.7 minutes. The unemployment rate in 2020-2024 averaged 20.8%.
| Measure | Tract 123 | Boulder |
|---|---|---|
| In the labor force (age 16+) | 37.9% ±4.3 pts | 63.7% |
| Unemployment rate | 20.8% ±5.6 pts | 6.0% |
| Drove alone to work | 17.1% ±6.6 pts | 39.1% |
| Carpooled | 2.8% ±2.2 pts | 3.2% |
| Public transportation | 7.9% ±4.8 pts | 5.1% |
| Walked | 29.0% ±6.6 pts | 9.5% |
| Worked from home | 29.2% ±7.8 pts | 34.4% |
| Mean travel time to work | 15.7 min ±2.0 | 18.1 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 123 compare with the other tracts in Boulder County?
Among Boulder County's tracts with a reliable estimate, Census Tract 123 ranks as shown below (1 = highest).
| Measure | In Boulder County | In Boulder |
|---|---|---|
| Population | 8th of 78 | 2nd of 30 |
| Residents per square mile | 3rd of 78 | 3rd of 30 |
| Median household income | 74th of 76 | 27th of 29 |
| Per capita income | 78th of 78 | 30th of 30 |
| Median gross rent | 73rd of 76 | 29th of 29 |
| Poverty rate | 7th of 57 | 7th of 26 |
| Bachelor's degree or higher | 1st of 78 | 1st of 30 |
| Median age | 78th of 78 | 30th of 30 |
The tracts next to it on Boulder County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 126.05 | 71st | $40,038±$16,517 · within the margin of this tract |
| Tract 124.01 | 72nd | $38,961±$11,249 · within the margin of this tract |
| Tract 122.06 | 73rd | $34,183±$6,002 · within the margin of this tract |
| Tract 123 | 74th | $33,750±$3,691 |
| Tract 126.09 | 75th | $30,119±$4,957 · within the margin of this tract |
| Tract 126.10 | 76th | $23,590±$5,379 |
"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 123?
2 of the 17 figures for Census Tract 123 on this page carry a coefficient of variation over 40% and are 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