What city is 80138 in?

80138 is a Parker, CO mailing address. By land area, 10% lies inside Parker and 1% lies inside Aurora; the rest is outside any Census-defined city or community.

What is the population of 80138?

About 36,895 people (±2,236), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 34,337.

What is the median household income in 80138?

$145,013 (±$11,807), 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 80138?

22 USPS carrier routes with 13,298 residential and 388 business mailboxes (13,687 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 80138?

The closest, measured center to center: 80016 (5.9 mi, Aurora), 80134 (6.3 mi, Parker), 80107 (9 mi, Ponderosa Park), 80015 (10 mi, Centennial), 80108 (11 mi, Castle Pines) and 80112 (11 mi, Centennial).

80138 ZIP Code, Parker, CO

Q: What county is 80138 in?

80138 is mostly in Douglas County (55% of its land), with smaller parts in Elbert County.

80138 is a ZIP code in Parker, Colorado — mostly in Douglas County (55% of its land), with smaller parts in Elbert County. It covers 62 square miles of land. The closest ZIP codes are 80016, 80134 and 80107. 36,895 people live here in 12,447 households, more than in 9 of every 10 Colorado ZIP codes. With about 595 people per square mile it is lightly settled, and most homes are owner-occupied (79%). Median household income is $145,013, well above the Colorado median of $95,470.

Quick facts

Mailing city: Parker, CO
County: Douglas County
Land area: 62 sq mi
Population: 36,895
Median household income: $145,013
Carrier routes: 22 (13,298 homes)

Key figures

Measure	Value
Residents	36,895
Households	12,447
Median household income	$145,013
Income per person	$64,516
Median age	40.2
Homeowners	79.4%
Median home value	$723,600
Median rent	$2,036
Bachelor's degree or higher	51.1%
Average commute (minutes)	27.8
Households with kids under 18	39.3%
Moved in the past year	15.4%
Below the poverty line	5.5%
Broadband internet	97.4%
Speak a non-English language at home	8.3%

Household income

% of households	Value
<$10K	2.6%
$10–15K	0.9%
$15–25K	2.7%
$25–35K	2.4%
$35–50K	5.4%
$50–75K	10.3%
$75–100K	8.5%
$100–150K	18.4%
$150–200K	16.5%
$200K+	32.4%

Age

% of all residents	Value
<10	12.0%
10–19	15.1%
20–24	5.9%
25–34	10.1%
35–44	15.3%
45–54	14.0%
55–64	13.6%
65–74	9.1%
75+	4.9%

Tenure

% of housing units	Value
Owned, with mortgage	59.8%
Owned outright	17.7%
Rented	19.9%
Vacant	2.5%

Type of building

% of housing units	Value
Detached house	78.9%
Townhome	5.5%
2–4 units	0.4%
5–19 units	9.2%
20+ units	5.7%
Mobile / other	0.3%

Businesses in 80138

849 business establishments with 7,672 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 154
Construction: 138
Health Care and Social Assistance: 128
Other Services (except Public Administration): 79
Real Estate and Rental and Leasing: 72
Retail Trade: 53
Accommodation and Food Services: 47
Finance and Insurance: 43

EDDM carrier routes

80138 has 22 USPS carrier routes with 13,298 residential and 388 business mailboxes. Open the EDDM route map.

Carrier routes in 80138

80138 has 22 USPS carrier routes (22 rural (R)) with 13,298 residential and 388 business mailboxes. Routes range from 224 homes (R064) to 1,085 homes (R060); the median route has 572 homes. The Census counted 12,447 households in 80138 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	8
500–749	9
750–999	3
1,000–1,499	1
1,500+	0

Best routes in 80138 for…

Most businesses

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

Route R064 — USPS business mailboxes 178, 224 homes
Route R049 — USPS business mailboxes 129, 666 homes
Route R060 — USPS business mailboxes 31, 1,085 homes
Route R028 — USPS business mailboxes 15, 496 homes
Route R002 — USPS business mailboxes 10, 599 homes

Select these 5 routes on the route map

Every carrier route in 80138

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R002	Rural	599	10	$120,447	—	—	—
R003	Rural	514	0	$132,016	—	—	—
R005	Rural	487	3	$165,722	—	—	—
R006	Rural	483	1	$132,016	—	—	—
R012	Rural	457	0	$155,950	—	—	—
R013	Rural	707	1	$161,016	—	—	—
R021	Rural	767	1	$160,172	—	—	—
R024	Rural	464	3	$180,843	—	—	—
R027	Rural	479	0	$165,722	—	—	—
R028	Rural	496	15	$153,278	—	—	—
R030	Rural	902	3	$71,405	—	—	—
R033	Rural	649	0	$153,794	—	—	—
R036	Rural	911	1	$157,345	—	—	—
R040	Rural	712	2	$153,794	—	—	—
R042	Rural	566	1	$160,172	—	—	—
R044	Rural	639	1	$183,959	—	—	—
R049	Rural	666	129	$120,447	—	—	—
R051	Rural	430	2	$139,289	—	—	—
R056	Rural	577	3	$157,345	—	—	—
R060	Rural	1,085	31	$112,638	—	—	—
R064	Rural	224	178	$55,072	—	—	—
R071	Rural	484	3	$174,155	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 80138 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

80016 — Aurora city, CO (5.9 mi)
80134 — Parker town, CO (6.3 mi)
80107 — Ponderosa Park CDP, CO (9 mi)
80015 — Centennial city, CO (10 mi)
80108 — Castle Pines city, CO (11 mi)
80112 — Centennial city, CO (11 mi)
80013 — Aurora city, CO (11.2 mi)
80124 — Lone Tree city, CO (11.8 mi)

Areas that include 80138

Where it ranks

Mail every home in 80138

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) 80138, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 80138 in?: 80138 is a Parker, CO mailing address. By land area, 10% lies inside Parker and 1% lies inside Aurora; the rest is outside any Census-defined city or community.
What county is 80138 in?: 80138 is mostly in Douglas County (55% of its land), with smaller parts in Elbert County.
What is the population of 80138?: About 36,895 people (±2,236), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 34,337.
What is the median household income in 80138?: $145,013 (±$11,807), 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 80138?: 22 USPS carrier routes with 13,298 residential and 388 business mailboxes (13,687 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 80138?: The closest, measured center to center: 80016 (5.9 mi, Aurora), 80134 (6.3 mi, Parker), 80107 (9 mi, Ponderosa Park), 80015 (10 mi, Centennial), 80108 (11 mi, Castle Pines) and 80112 (11 mi, Centennial).

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