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

80550 (Windsor), at 52.2%, among 25 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 Weld County, CO

These are the 25 ZIP codes in Weld County with the fastest population growth, out of 25 with at least 1,000 residents. 80550 (Windsor, 52.2%), 80650 (Pierce, 45.4%) and 80513 (Berthoud, 41.4%) lead the list. There is no single "best" ZIP code in Weld 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 Weld County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	80550	Windsor	52.2%	46,456	17,690	21,006
2	80650	Pierce	45.4%	2,192	799	484
3	80513	Berthoud	41.4%	18,271	6,925	8,166
4	80516	Erie	38.2%	39,048	13,616	14,966
5	80543	Milliken	33.1%	9,774	3,385	3,097
6	80530	Frederick	32.3%	6,242	2,258	—
7	80643	Keenesburg	29.7%	5,119	1,798	1,665
8	82082	Pine Bluffs	26.6%	1,891	840	205
9	80514	Dacono	22.5%	6,721	2,361	2,387
10	80610	Ault	21.2%	4,132	1,535	1,209
11	80603	Brighton	20.6%	16,811	5,622	5,920
12	80534	Johnstown	19.8%	20,502	7,457	10,148
13	80621	Fort Lupton	18.0%	15,060	5,052	5,884
14	80504	Longmont	14.4%	63,451	24,077	25,785
15	80651	Platteville	12.9%	4,837	1,759	1,584
16	80634	Greeley	9.9%	65,622	25,280	29,891
17	80524	Fort Collins	9.7%	40,030	17,399	18,661
18	80615	Eaton	9.3%	9,060	3,402	3,578
19	80620	Evans	6.0%	20,798	6,576	7,909
20	80542	Mead	4.8%	5,155	1,662	2,107
21	80645	La Salle	-1.6%	4,917	1,760	1,568
22	80631	Greeley	-3.8%	53,722	17,863	18,439
23	80642	Hudson	-18.3%	4,466	1,471	1,177
24	80520	Firestone	-30.3%	1,140	582	—
25	80644	Kersey	-31.9%	2,124	809	697

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; 25 of 39 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 42,415 households, on 63 carrier routes with 47,719 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 80550 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Weld County has the fastest population growth?: 80550 (Windsor), at 52.2%, among 25 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.