80128 ZIP Code, Littleton, CO
80128 is a ZIP code in Littleton, Colorado — mostly in Jefferson County (90% of its land), with smaller parts in Arapahoe County. It covers 13 square miles of land. The closest ZIP codes are 80123, 80129 and 80120. 36,712 people live here in 14,385 households, more than in 9 of every 10 Colorado ZIP codes. At about 2,923 people per square mile it has suburban density, and most homes are owner-occupied (84%). Median household income is $121,436, above the Colorado median of $95,470.
Quick facts
- Mailing city: Littleton, CO
- County: Jefferson County
- Land area: 13 sq mi
- Population: 36,712
- Median household income: $121,436
- Carrier routes: 21 (14,788 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 36,712 |
| Households | 14,385 |
| Median household income | $121,436 |
| Income per person | $58,152 |
| Median age | 39.5 |
| Homeowners | 84.3% |
| Median home value | $586,000 |
| Median rent | $2,108 |
| Bachelor's degree or higher | 50.0% |
| Average commute (minutes) | 27.1 |
| Households with kids under 18 | 32.0% |
| Moved in the past year | 12.2% |
| Below the poverty line | 4.9% |
| Broadband internet | 97.9% |
| Speak a non-English language at home | 7.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 3.4% |
| $10–15K | 1.1% |
| $15–25K | 1.9% |
| $25–35K | 2.8% |
| $35–50K | 4.8% |
| $50–75K | 13.1% |
| $75–100K | 13.3% |
| $100–150K | 23.6% |
| $150–200K | 17.1% |
| $200K+ | 19.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.3% |
| 10–19 | 12.3% |
| 20–24 | 4.8% |
| 25–34 | 13.5% |
| 35–44 | 16.5% |
| 45–54 | 11.6% |
| 55–64 | 12.3% |
| 65–74 | 11.3% |
| 75+ | 5.4% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 62.0% |
| Owned outright | 20.9% |
| Rented | 15.2% |
| Vacant | 2.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 67.9% |
| Townhome | 16.2% |
| 2–4 units | 2.3% |
| 5–19 units | 9.4% |
| 20+ units | 4.1% |
| Mobile / other | 0.1% |
Businesses in 80128
662 business establishments with 3,549 employees (ZIP Codes Business Patterns 2023).
- Construction: 127
- Professional, Scientific, and Technical Services: 127
- Other Services (except Public Administration): 66
- Health Care and Social Assistance: 61
- Real Estate and Rental and Leasing: 58
- Retail Trade: 45
- Finance and Insurance: 40
- Administrative and Support and Waste Management and Remediation Services: 37
EDDM carrier routes
80128 has 21 USPS carrier routes with 14,788 residential and 297 business mailboxes. Open the EDDM route map.
Carrier routes in 80128
80128 has 21 USPS carrier routes (20 city (C), 1 highway contract (H)) with 14,788 residential and 297 business mailboxes. Routes range from 220 homes (H063) to 1,413 homes (C070); the median route has 640 homes. The Census counted 14,385 households in 80128 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 4 |
| 500–749 | 10 |
| 750–999 | 3 |
| 1,000–1,499 | 3 |
| 1,500+ | 0 |
Best routes in 80128 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C040 — USPS business mailboxes 83, 413 homes
- Route C057 — USPS business mailboxes 53, 998 homes
- Route C045 — USPS business mailboxes 39, 508 homes
- Route C079 — USPS business mailboxes 32, 731 homes
- Route C070 — USPS business mailboxes 27, 1,413 homes
Select these 5 routes on the route map
Every carrier route in 80128
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C040 | City | 413 | 83 | $123,375 | — | — | — |
| C041 | City | 723 | 4 | $116,809 | — | — | — |
| C042 | City | 511 | 0 | $123,375 | — | — | — |
| C043 | City | 939 | 1 | $141,369 | — | — | — |
| C044 | City | 1,257 | 1 | $100,864 | — | — | — |
| C045 | City | 508 | 39 | $104,504 | — | — | — |
| C046 | City | 716 | 5 | $149,637 | — | — | — |
| C047 | City | 564 | 0 | $104,504 | — | — | — |
| C048 | City | 373 | 0 | $168,182 | — | — | — |
| C049 | City | 1,133 | 8 | $143,022 | — | — | — |
| C050 | City | 584 | 9 | $102,235 | — | — | — |
| C052 | City | 451 | 1 | $167,829 | — | — | — |
| C054 | City | 455 | 1 | $162,508 | — | — | — |
| C057 | City | 998 | 53 | $183,419 | — | — | — |
| C059 | City | 952 | 0 | $160,566 | — | — | — |
| C061 | City | 646 | 2 | $200,001+ | — | — | — |
| C063 | City | 640 | 7 | $104,611 | — | — | — |
| C070 | City | 1,413 | 27 | $112,703 | — | — | — |
| C079 | City | 731 | 32 | $160,566 | — | — | — |
| C080 | City | 561 | 24 | $102,235 | — | — | — |
| H063 | Highway contract | 220 | 0 | $112,703 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 80128 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 80123 — Columbine CDP, CO (3.8 mi)
- 80129 — Highlands Ranch CDP, CO (3.8 mi)
- 80120 — Littleton city, CO (4.3 mi)
- 80127 — Dakota Ridge CDP, CO (5 mi)
- 80125 — Roxborough Park CDP, CO (5.3 mi)
- 80235 — Denver city, CO (6 mi)
- 80126 — Highlands Ranch CDP, CO (6.4 mi)
- 80236 — Denver city, CO (6.6 mi)
Areas that include 80128
- Littleton, CO ZIP codes — 10 ZIP codes
- Ken Caryl, CO ZIP codes — 3 ZIP codes
- Columbine, CO ZIP codes — 2 ZIP codes
- Jefferson County ZIP codes — 32 ZIP codes
- Colorado ZIP code data
Where it ranks
- No. 2 of 27: highest share of households with children in Jefferson County
- No. 4 of 10: highest share of owner-occupied homes in Littleton, CO
- No. 4 of 10: highest share of households with children in Littleton, CO
- No. 1 of 10: lowest median age in Littleton, CO
- No. 3 of 10: fastest population growth in Littleton, CO
Mail every home in 80128
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 80128, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 80128 in?
- 80128 is a Littleton, CO mailing address. By land area, 33% lies inside Columbine, 28% lies inside Ken Caryl and 6% lies inside Littleton; the rest is outside any Census-defined city or community.
- What county is 80128 in?
- 80128 is mostly in Jefferson County (90% of its land), with smaller parts in Arapahoe County.
- What is the population of 80128?
- About 36,712 people (±1,566), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 36,699.
- What is the median household income in 80128?
- $121,436 (±$6,402), compared with $95,470 for Colorado as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 80128?
- 21 USPS carrier routes with 14,788 residential and 297 business mailboxes (15,085 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 80128?
- The closest, measured center to center: 80123 (3.8 mi, Columbine), 80129 (3.8 mi, Highlands Ranch), 80120 (4.3 mi, Littleton), 80127 (5 mi, Dakota Ridge), 80125 (5.3 mi, Roxborough Park) and 80235 (6 mi, Denver).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.