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

80470 (Pine), at 55.1 (±5.5), 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.

Oldest ZIP codes in Jefferson County, CO

These are the 25 ZIP codes in Jefferson County with the highest median age, out of 27 with at least 1,000 residents. 80470 (Pine, 55.1), 80135 (Sedalia, 54.9) and 80433 (Conifer, 49.1) 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.

Oldest ZIP codes in Jefferson County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	80470	Pine	55.1 ±5.5	3,608	1,552	1,625
2	80135	Sedalia	54.9 ±3.7	4,141	1,679	1,442
3	80433	Conifer	49.1 ±2.6	8,292	3,408	3,507
4	80439	Evergreen	49.0 ±1.9	24,610	10,218	10,456
5	80403	Golden	45.6 ±1.8	20,732	8,490	9,074
6	80127	Littleton	44.7 ±1.2	43,494	17,140	18,284
7	80465	Morrison	44.4 ±1.8	16,582	6,409	6,204
8	80004	Arvada	43.2 ±1.7	33,700	14,387	15,211
9	80005	Arvada	42.7 ±1.6	28,459	11,217	11,406
10	80033	Wheat Ridge	42.4 ±1.2	26,485	12,474	13,507
11	80123	Littleton	41.8 ±1.3	44,549	19,270	19,726
12	80007	Arvada	40.7 ±1.9	19,078	6,656	7,100
13	80227	Denver	40.6 ±1.5	34,907	15,589	16,062
14	80128	Littleton	39.5 ±1.1	36,712	14,385	14,788
15	80031	Westminster	39.5 ±1.5	35,584	14,529	15,791
16	80228	Denver	39.4 ±1.3	34,942	15,327	16,283
17	80232	Denver	39.1 ±1.7	23,050	9,619	9,362
18	80215	Denver	39.1 ±3.9	19,839	8,726	9,908
19	80401	Golden	38.8 ±0.9	43,811	17,319	19,125
20	80212	Denver	38.1 ±1.5	20,746	10,212	10,066
21	80226	Denver	37.8 ±1.4	31,573	13,780	14,279
22	80020	Broomfield	37.7 ±0.6	54,201	21,326	22,532
23	80003	Arvada	37.4 ±1.2	35,976	13,795	14,501
24	80021	Broomfield	36.6 ±1.4	36,555	17,163	19,115
25	80235	Denver	36.6 ±2.7	8,373	4,033	4,288

How we ranked them

Ranked by median age of all residents, highest 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

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 25,347 households, on 58 carrier routes with 26,104 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80470 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

Map it and price it

EDDM guides

Frequently asked questions

Which ZIP code in Jefferson County has the highest median age?: 80470 (Pine), at 55.1 (±5.5), among 27 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest 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.