Which ZIP code in Littleton has the highest median age?

80121 (Littleton), at 47.8 (±3.1), among 10 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 Littleton, CO

These are the 10 ZIP codes in Littleton, CO with the highest median age, out of 10 with at least 1,000 residents. 80121 (Littleton, 47.8), 80127 (Littleton, 44.7) and 80120 (Littleton, 42.5) lead the list. There is no single "best" ZIP code in Littleton; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Oldest ZIP codes in Littleton

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	80121	Littleton	47.8 ±3.1	18,029	7,270	7,408
2	80127	Littleton	44.7 ±1.2	43,494	17,140	18,284
3	80120	Littleton	42.5 ±1.9	29,725	13,377	13,489
4	80122	Littleton	42.3 ±1.2	32,195	12,969	13,151
5	80123	Littleton	41.8 ±1.3	44,549	19,270	19,726
6	80126	Littleton	41.7 ±0.9	44,882	16,058	15,893
7	80129	Littleton	41.2 ±2.3	30,223	12,510	13,526
8	80130	Littleton	40.7 ±1.4	24,719	9,305	9,915
9	80125	Littleton	40.6 ±1.2	15,630	5,635	7,535
10	80128	Littleton	39.5 ±1.1	36,712	14,385	14,788

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; 10 of 10 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 70,026 households, on 131 carrier routes with 72,058 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80121 on the EDDM route map

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Frequently asked questions

Which ZIP code in Littleton has the highest median age?: 80121 (Littleton), at 47.8 (±3.1), among 10 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.