Census tract · Boulder County
Census Tract 129.04, Boulder County, Colorado
Census Tract 129.04, GEOID 08013012904, in Boulder County, Colorado, mostly within Lafayette (73% of its census blocks). 6,144 residents in the ACS 2020-2024 5-year estimates (±672); the 2020 Census counted 5,864.
Residents, 2020-2024
6,144
±672 (90% margin)
2020 Census count: 5,864
Median household income
$153,833
±$28,448 (90% margin)
Boulder County: $103,994
Median home value
$690,000
±$35,003 (90% margin)
Boulder County: $756,300
Median gross rent
$2,801
±$1,071 (90% margin)
Boulder County: $1,966
Where is Census Tract 129.04?
Census Tract 129.04 is one of 78 census tracts in Boulder County, Colorado. It covers 1.21 square miles of land, 4,842 residents per square mile in 2020. Its GEOID, 08013012904, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Lafayette | 73% |
| Louisville | 20% |
5 census tracts border Census Tract 129.04: Tract 129.03 ($168,500), Tract 129.05 ($79,881), Tract 129.07 ($127,308), Tract 130.03 ($144,494) and Tract 609 ($128,824). 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 129.04?
The 2020-2024 American Community Survey puts Census Tract 129.04's population at 6,144 (±672) in 2,520 households; the 2020 Census counted 5,864 residents and 2,376 housing units.
| Measure | Tract 129.04 | Lafayette |
|---|---|---|
| Total population | 6,144 ±672 | 30,602 |
| Households | 2,520 ±371 | 12,628 |
| Average household size | 2.37 ±0.27 | 2.41 |
| Housing units | 2,710 ±310 | 12,939 |
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 129.04?
The median resident of Census Tract 129.04 is 49.3 years old; 17.2% are under 18 and 25.6% are 65 or older. The largest group is non-Hispanic white residents at 87.2%, then Hispanic or Latino residents (of any race) at 5.0%. 5.6% of residents were born outside the United States.
| Measure | Tract 129.04 | Lafayette |
|---|---|---|
| Median age | 49.3 ±8.1 | 39.1 |
| Under 18 years | 17.2% ±2.5 pts | 21.7% |
| 65 years and over | 25.6% ±4.0 pts | 16.1% |
| Hispanic or Latino (any race) | 5.0% ±2.5 pts | 19.2% |
| White alone, not Hispanic | 87.2% ±4.3 pts | 69.5% |
| Black or African American alone, not Hispanic | 2.6% ±2.3 pts | 0.8% |
| Asian alone, not Hispanic | 1.5% ±1.1 pts | 3.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.2% |
| Two or more races, not Hispanic | 3.7% ±2.2 pts | 6.1% |
| Some other race alone, not Hispanic | 0.0% ±0.7 pts | 0.3% |
| Born outside the United States | 5.6% ±2.5 pts | 10.8% |
| Speak a language other than English at home (age 5+) | 7.9% ±3.4 pts | 17.3% |
| Civilian veterans (age 18+) | 4.4% ±2.6 pts | 3.2% |
| With a disability | 7.9% ±3.7 pts | 9.2% |
| No health insurance coverage | 0.7% ±0.6 pts | 4.3% |
| High school graduate or higher (age 25+) | 99.6% ±0.9 pts | 95.0% |
| Bachelor's degree or higher (age 25+) | 64.3% ±5.8 pts | 63.5% |
| Graduate or professional degree (age 25+) | 25.3% ±5.5 pts | 26.8% |
| Lived in the same house a year earlier | 89.3% ±4.9 pts | 86.3% |
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 129.04 earn?
Half of the 2,520 households in Census Tract 129.04 earn less than $153,833 a year (±$28,448), against $103,994 across Boulder County: 14th highest of the county's 76 tracts with a reliable estimate. 6.1% of residents live below the poverty line.
| Measure | Tract 129.04 | Lafayette |
|---|---|---|
| Median household income | $153,833 ±$28,448 | $119,040 |
| Mean household income | $162,169 ±$15,752 | $151,939 |
| Per capita income | $65,726 ±$8,623 | $62,261 |
| People below the poverty line | 6.1% ±3.8 pts | 5.6% |
| Children under 18 below the poverty line | 16.1% ±13.9 pts | 4.9% |
| Households receiving SNAP | 6.4% ±4.4 pts | 5.7% |
| Households with a computer | 94.9% ±4.9 pts | 98.1% |
| Households with a broadband subscription | 90.9% ±5.4 pts | 95.4% |
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 129.04?
Owners occupy 76.9% of Census Tract 129.04's occupied homes and renters 23.1%. The median owner-occupied home is valued at $690,000 by its owner (±$35,003). The median renter pays $2,801 a month including utilities, and 57.6% of renters pay 35% or more of their income on rent.
| Measure | Tract 129.04 | Lafayette |
|---|---|---|
| Median home value (owner-occupied) | $690,000 ±$35,003 | $686,500 |
| Median gross rent | $2,801 ±$1,071 | $2,121 |
| Renters paying 35% or more of income on rent | 57.6% ±19.1 pts | 43.0% |
| Median monthly owner costs, with a mortgage | $2,382 ±$190 | $2,513 |
| Owner-occupied homes | 76.9% ±7.1 pts | 65.7% |
| Renter-occupied homes | 23.1% ±7.1 pts | 34.3% |
| Housing units | 2,710 ±310 | 12,939 |
| Single-family detached homes | 67.9% ±7.6 pts | 55.1% |
| Mobile homes | 0.0% ±1.6 pts | 5.4% |
| Built 2020 or later | 1.7% ±1.6 pts | 2.4% |
| Built 2010 to 2019 | 14.4% ±5.5 pts | 21.0% |
| Built 1939 or earlier | 0.0% ±1.6 pts | 3.2% |
| Households with no vehicle | 11.0% ±6.4 pts | 3.4% |
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 129.04 get to work?
47.6% of Census Tract 129.04's workers drive alone and 47.2% work from home. The average trip to work takes 21.3 minutes.
| Measure | Tract 129.04 | Lafayette |
|---|---|---|
| In the labor force (age 16+) | 61.1% ±5.8 pts | 72.5% |
| Unemployment rate | 3.7% ±2.9 pts | 3.8% |
| Drove alone to work | 47.6% ±8.3 pts | 60.0% |
| Carpooled | 1.8% ±1.6 pts | 5.8% |
| Public transportation | 0.1% ±0.3 pts | 1.2% |
| Walked | 1.7% ±2.3 pts | 1.1% |
| Worked from home | 47.2% ±8.2 pts | 30.1% |
| Mean travel time to work | 21.3 min ±2.4 | 23.6 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 129.04 compare with the other tracts in Boulder County?
Among Boulder County's tracts with a reliable estimate, Census Tract 129.04 ranks as shown below (1 = highest).
| Measure | In Boulder County | In Lafayette |
|---|---|---|
| Population | 12th of 78 | 1st of 7 |
| Residents per square mile | 25th of 78 | 2nd of 7 |
| Median household income | 14th of 76 | 2nd of 7 |
| Per capita income | 37th of 78 | 3rd of 7 |
| Median home value | 48th of 75 | 3rd of 6 |
| Median gross rent | 10th of 76 | 2nd of 7 |
| Poverty rate | 42nd of 57 | 4th of 5 |
| Bachelor's degree or higher | 48th of 78 | 4th of 7 |
| Median age | 11th of 78 | 2nd of 7 |
| Owner-occupied share | 28th of 76 | 2nd of 7 |
The tracts next to it on Boulder County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 127.10 | 11th | $165,781±$22,488 · within the margin of this tract |
| Tract 121.04 | 12th | $155,313±$26,404 · within the margin of this tract |
| Tract 132.05 | 13th | $155,234±$32,423 · within the margin of this tract |
| Tract 129.04 | 14th | $153,833±$28,448 |
| Tract 607 | 15th | $153,726±$20,382 · within the margin of this tract |
| Tract 127.09 | 16th | $151,250±$62,606 · within the margin of this tract |
| Tract 125.10 | 17th | $145,625±$23,475 · 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 129.04?
2 of the 18 figures for Census Tract 129.04 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