Which ZIP code in Douglas County has the lowest median age?

80112 (Englewood), at 36.0 (±1.4), among 14 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Youngest ZIP codes in Douglas County, CO

These are the 14 ZIP codes in Douglas County with the lowest median age, out of 14 with at least 1,000 residents. 80112 (Englewood, 36.0), 80109 (Castle Rock, 36.9) and 80134 (Parker, 37.5) lead the list. There is no single "best" ZIP code in Douglas County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in Douglas County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	80112	Englewood	36.0 ±1.4	36,816	16,618	17,481
2	80109	Castle Rock	36.9 ±1.9	28,400	9,728	10,556
3	80134	Parker	37.5 ±0.7	80,302	28,658	34,169
4	80104	Castle Rock	38.2 ±1.2	38,479	14,383	16,114
5	80124	Lone Tree	38.7 ±1.8	22,555	9,948	10,582
6	80138	Parker	40.2 ±1.6	36,895	12,447	13,298
7	80108	Castle Rock	40.5 ±1.5	36,730	12,994	15,801
8	80125	Littleton	40.6 ±1.2	15,630	5,635	7,535
9	80130	Littleton	40.7 ±1.4	24,719	9,305	9,915
10	80129	Littleton	41.2 ±2.3	30,223	12,510	13,526
11	80126	Littleton	41.7 ±0.9	44,882	16,058	15,893
12	80116	Franktown	52.2 ±3.4	5,132	1,846	1,768
13	80118	Larkspur	54.0 ±3.4	5,632	2,165	2,498
14	80135	Sedalia	54.9 ±3.7	4,141	1,679	1,442

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 14 of 15 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 79,335 households, on 136 carrier routes with 88,902 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80112 on the EDDM route map

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Frequently asked questions

Which ZIP code in Douglas County has the lowest median age?: 80112 (Englewood), at 36.0 (±1.4), among 14 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

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