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

99338 (Kennewick), at 24.6%, 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.

Fastest-growing ZIP codes in Benton County, WA

These are the 10 ZIP codes in Benton County with the fastest population growth, out of 10 with at least 1,000 residents. 99338 (Kennewick, 24.6%), 99353 (West Richland, 19.2%) and 99352 (Richland, 17.3%) lead the list. There is no single "best" ZIP code in Benton 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 Benton County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	99338	Kennewick	24.6%	20,633	6,937	8,749
2	99353	West Richland	19.2%	19,251	6,411	—
3	99352	Richland	17.3%	37,430	14,795	17,235
4	99350	Prosser	10.0%	14,837	4,676	4,897
5	99354	Richland	7.7%	25,559	10,518	11,073
6	99337	Kennewick	2.7%	33,287	11,390	—
7	98930	Grandview	0.7%	15,730	4,923	4,989
8	99320	Benton City	-0.7%	9,879	3,495	3,976
9	99336	Kennewick	-2.4%	50,735	19,385	20,517
10	98944	Sunnyside	-3.3%	22,817	6,433	6,767

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; 10 of 12 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 43,337 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 99338 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 Benton County has the fastest population growth?: 99338 (Kennewick), at 24.6%, among 10 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.