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

80214 (Denver), at 35.0 (±1.3), among 27 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 Jefferson County, CO

These are the 25 ZIP codes in Jefferson County with the lowest median age, out of 27 with at least 1,000 residents. 80214 (Denver, 35.0), 80002 (Arvada, 36.4) and 80021 (Broomfield, 36.6) lead the list. There is no single "best" ZIP code in Jefferson 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 Jefferson County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	80214	Denver	35.0 ±1.3	27,022	12,721	13,553
2	80002	Arvada	36.4 ±1.4	21,270	9,755	10,727
3	80021	Broomfield	36.6 ±1.4	36,555	17,163	19,115
4	80235	Denver	36.6 ±2.7	8,373	4,033	4,288
5	80003	Arvada	37.4 ±1.2	35,976	13,795	14,501
6	80020	Broomfield	37.7 ±0.6	54,201	21,326	22,532
7	80226	Denver	37.8 ±1.4	31,573	13,780	14,279
8	80212	Denver	38.1 ±1.5	20,746	10,212	10,066
9	80401	Golden	38.8 ±0.9	43,811	17,319	19,125
10	80232	Denver	39.1 ±1.7	23,050	9,619	9,362
11	80215	Denver	39.1 ±3.9	19,839	8,726	9,908
12	80228	Denver	39.4 ±1.3	34,942	15,327	16,283
13	80128	Littleton	39.5 ±1.1	36,712	14,385	14,788
14	80031	Westminster	39.5 ±1.5	35,584	14,529	15,791
15	80227	Denver	40.6 ±1.5	34,907	15,589	16,062
16	80007	Arvada	40.7 ±1.9	19,078	6,656	7,100
17	80123	Littleton	41.8 ±1.3	44,549	19,270	19,726
18	80033	Wheat Ridge	42.4 ±1.2	26,485	12,474	13,507
19	80005	Arvada	42.7 ±1.6	28,459	11,217	11,406
20	80004	Arvada	43.2 ±1.7	33,700	14,387	15,211
21	80465	Morrison	44.4 ±1.8	16,582	6,409	6,204
22	80127	Littleton	44.7 ±1.2	43,494	17,140	18,284
23	80403	Golden	45.6 ±1.8	20,732	8,490	9,074
24	80439	Evergreen	49.0 ±1.9	24,610	10,218	10,456
25	80433	Conifer	49.1 ±2.6	8,292	3,408	3,507

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; 27 of 32 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 57,467 households, on 89 carrier routes with 62,184 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80214 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Jefferson County has the lowest median age?: 80214 (Denver), at 35.0 (±1.3), among 27 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.