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

80521 (Fort Collins), at 22.9 (±0.4), 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.

Youngest ZIP codes in Larimer County, CO

These are the 16 ZIP codes in Larimer County with the lowest median age, out of 16 with at least 1,000 residents. 80521 (Fort Collins, 22.9), 80526 (Fort Collins, 34.1) and 80534 (Johnstown, 35.0) 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.

Youngest ZIP codes in Larimer County

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

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; 16 of 21 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 67,588 households, on 104 carrier routes with 72,706 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80521 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 Larimer County has the lowest median age?: 80521 (Fort Collins), at 22.9 (±0.4), among 16 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.