80123 ZIP Code, Littleton, CO

80123 is a ZIP code in Littleton, Colorado — mostly in Jefferson County (50% of its land), with smaller parts in Arapahoe and Denver counties. It covers 12 square miles of land. The closest ZIP codes are 80235, 80236 and 80120. 44,549 people live here in 19,270 households, more than in 9 of every 10 Colorado ZIP codes. At about 3,705 people per square mile it has suburban density, and most homes are owner-occupied (73%). Median household income is $105,932, above the Colorado median of $95,470.

Quick facts

Key figures

MeasureValue
Residents44,549
Households19,270
Median household income$105,932
Income per person$63,179
Median age41.8
Homeowners72.8%
Median home value$620,100
Median rent$2,077
Bachelor's degree or higher53.7%
Average commute (minutes)26.2
Households with kids under 1826.5%
Moved in the past year12.9%
Below the poverty line4.4%
Broadband internet96.4%
Speak a non-English language at home10.3%

Household income

% of householdsValue
<$10K2.7%
$10–15K1.3%
$15–25K3.7%
$25–35K4.2%
$35–50K7.4%
$50–75K15.4%
$75–100K12.3%
$100–150K22.5%
$150–200K9.8%
$200K+20.7%

Age

% of all residentsValue
<1010.6%
10–1910.5%
20–243.9%
25–3413.2%
35–4416.2%
45–5411.2%
55–6413.0%
65–7412.0%
75+9.5%

Tenure

% of housing unitsValue
Owned, with mortgage50.1%
Owned outright20.6%
Rented25.9%
Vacant3.4%

Type of building

% of housing unitsValue
Detached house57.0%
Townhome10.5%
2–4 units3.7%
5–19 units18.2%
20+ units10.2%
Mobile / other0.3%

Businesses in 80123

1,276 business establishments with 12,942 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

80123 has 31 USPS carrier routes with 19,726 residential and 806 business mailboxes. Open the EDDM route map.

Carrier routes in 80123

80123 has 31 USPS carrier routes (31 city (C)) with 19,726 residential and 806 business mailboxes. Routes range from 163 homes (C032) to 1,234 homes (C023); the median route has 597 homes. The Census counted 19,270 households in 80123 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–4998
500–74915
750–9994
1,000–1,4993
1,500+0

Best routes in 80123 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C068 — USPS business mailboxes 249, 929 homes
  2. Route C067 — USPS business mailboxes 86, 689 homes
  3. Route C002 — USPS business mailboxes 80, 516 homes
  4. Route C008 — USPS business mailboxes 54, 1,198 homes
  5. Route C078 — USPS business mailboxes 45, 863 homes

Select these 5 routes on the route map

Every carrier route in 80123

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C002City51680$151,445———
C003City46915$117,984———
C004City3920$67,491———
C006City2862$117,984———
C008City1,19854$77,371———
C017City99010$200,001+———
C018City5283$170,419———
C019City5391$79,928———
C020City62323$59,294———
C022City4481$165,039———
C023City1,2346$59,294———
C025City65135$194,766———
C026City7211$107,162———
C028City8141$105,440———
C030City4452$200,001+———
C031City57824$132,539———
C032City1630$67,491———
C033City4040$165,039———
C034City4762$200,001+———
C036City6773$105,440———
C038City53424$165,039———
C039City63224$130,599———
C043City59741$105,440———
C064City1,13338$75,117———
C066City60926$59,294———
C067City68986$61,709———
C068City929249$132,539———
C074City5410$175,309———
C076City3904$197,422———
C077City6576$67,491———
C078City86345$158,089———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 80123 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

Areas that include 80123

Where it ranks

Mail every home in 80123

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.

Denver EDDM mailing

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 80123, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 80123 in?
80123 is a Littleton, CO mailing address. By land area, 20% lies inside Columbine, 19% lies inside Denver, 16% lies inside Littleton and 8% lies inside Ken Caryl; the rest is outside any Census-defined city or community.
What county is 80123 in?
80123 is mostly in Jefferson County (50% of its land), with smaller parts in Arapahoe and Denver counties.
What is the population of 80123?
About 44,549 people (±1,778), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 47,302.
What is the median household income in 80123?
$105,932 (±$3,663), 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 80123?
31 USPS carrier routes with 19,726 residential and 806 business mailboxes (20,532 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 80123?
The closest, measured center to center: 80235 (2.4 mi, Denver), 80236 (2.9 mi, Denver), 80120 (3.4 mi, Littleton), 80110 (3.7 mi, Englewood), 80128 (3.8 mi, Columbine) and 80227 (3.8 mi, Lakewood).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.