Which ZIP code in Douglas County has the fastest population growth?

80125 (Littleton), at 48.2%, among 14 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.

Fastest-growing ZIP codes in Douglas County, CO

These are the 14 ZIP codes in Douglas County with the fastest population growth, out of 14 with at least 1,000 residents. 80125 (Littleton, 48.2%), 80108 (Castle Rock, 32.5%) and 80104 (Castle Rock, 22.1%) lead the list. There is no single "best" ZIP code in Douglas County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Fastest-growing ZIP codes in Douglas County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	80125	Littleton	48.2%	15,630	5,635	7,535
2	80108	Castle Rock	32.5%	36,730	12,994	15,801
3	80104	Castle Rock	22.1%	38,479	14,383	16,114
4	80109	Castle Rock	20.0%	28,400	9,728	10,556
5	80116	Franktown	17.4%	5,132	1,846	1,768
6	80134	Parker	16.1%	80,302	28,658	34,169
7	80138	Parker	9.9%	36,895	12,447	13,298
8	80112	Englewood	8.0%	36,816	16,618	17,481
9	80124	Lone Tree	6.0%	22,555	9,948	10,582
10	80126	Littleton	3.5%	44,882	16,058	15,893
11	80135	Sedalia	2.6%	4,141	1,679	1,442
12	80129	Littleton	-3.4%	30,223	12,510	13,526
13	80118	Larkspur	-13.0%	5,632	2,165	2,498
14	80130	Littleton	-14.7%	24,719	9,305	9,915

How we ranked them

Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 14 of 15 qualify.

Which of these to mail, and why

Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.

The top five ZIP codes on this list hold 44,586 households, on 81 carrier routes with 51,774 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80125 on the EDDM route map

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Frequently asked questions

Which ZIP code in Douglas County has the fastest population growth?: 80125 (Littleton), at 48.2%, among 14 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have 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.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.