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

80517 (Estes Park), at 55.8 (±4.2), among 16 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 Larimer County, CO

These are the 16 ZIP codes in Larimer County with the highest median age, out of 16 with at least 1,000 residents. 80517 (Estes Park, 55.8), 80536 (Livermore, 55.8) and 80535 (Laporte, 53.1) lead the list. There is no single "best" ZIP code in Larimer 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 Larimer County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	80517	Estes Park	55.8 ±4.2	9,657	4,533	5,645
2	80536	Livermore	55.8 ±7.2	2,383	974	1,024
3	80535	Laporte	53.1 ±13.7	1,896	965	729
4	80512	Bellvue	51.9 ±4.0	1,903	939	846
5	80540	Lyons	48.1 ±2.8	4,642	2,025	1,402
6	80538	Loveland	42.9 ±1.7	50,110	21,474	24,030
7	80513	Berthoud	42.3 ±2.9	18,271	6,925	8,166
8	80537	Loveland	41.1 ±1.9	44,425	19,474	20,236
9	80525	Fort Collins	37.9 ±1.4	54,211	24,410	25,302
10	80524	Fort Collins	35.9 ±1.3	40,030	17,399	18,661
11	80549	Wellington	35.9 ±1.4	14,325	5,088	4,694
12	80547	Timnath	35.9 ±2.4	8,821	2,961	4,276
13	80528	Fort Collins	35.7 ±2.1	24,960	9,325	10,079
14	80534	Johnstown	35.0 ±1.8	20,502	7,457	10,148
15	80526	Fort Collins	34.1 ±1.2	44,326	19,147	19,654
16	80521	Fort Collins	22.9 ±0.4	38,776	14,260	14,164

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; 16 of 21 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 9,436 households, on 22 carrier routes with 9,646 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80517 on the EDDM route map

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Frequently asked questions

Which ZIP code in Larimer County has the highest median age?: 80517 (Estes Park), at 55.8 (±4.2), among 16 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.