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

98862 (Winthrop), at 21.7%, among 12 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 Okanogan County, WA

These are the 12 ZIP codes in Okanogan County with the fastest population growth, out of 12 with at least 1,000 residents. 98862 (Winthrop, 21.7%), 99116 (Coulee Dam, 17.4%) and 98844 (Oroville, 14.6%) lead the list. There is no single "best" ZIP code in Okanogan 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 Okanogan County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	98862	Winthrop	21.7%	2,995	1,380	837
2	99116	Coulee Dam	17.4%	1,786	763	577
3	98844	Oroville	14.6%	4,873	2,247	1,934
4	98856	Twisp	14.0%	2,920	1,316	592
5	98846	Pateros	9.6%	1,376	483	139
6	98841	Omak	4.8%	9,737	3,769	2,664
7	98840	Okanogan	0.6%	4,892	1,950	1,450
8	99155	Nespelem	0.2%	1,009	362	—
9	98813	Bridgeport	-0.4%	2,826	756	120
10	98855	Tonasket	-3.3%	5,857	2,328	2,384
11	98812	Brewster	-6.2%	4,834	1,580	455
12	98849	Riverside	-16.8%	1,096	583	472

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; 12 of 20 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 6,189 households, on 11 carrier routes with 4,079 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 98862 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 Okanogan County has the fastest population growth?: 98862 (Winthrop), at 21.7%, among 12 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.