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

83854 (Post Falls), at 28.6%, 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 Kootenai County, ID

These are the 10 ZIP codes in Kootenai County with the fastest population growth, out of 10 with at least 1,000 residents. 83854 (Post Falls, 28.6%), 83858 (Rathdrum, 28.1%) and 83815 (Coeur D Alene, 17.8%) lead the list. There is no single "best" ZIP code in Kootenai 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 Kootenai County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	83854	Post Falls	28.6%	54,851	20,056	23,719
2	83858	Rathdrum	28.1%	20,137	7,243	8,624
3	83815	Coeur D Alene	17.8%	41,405	16,657	—
4	83810	Cataldo	15.0%	1,412	638	510
5	83835	Hayden	11.8%	24,238	9,110	—
6	83869	Spirit Lake	7.6%	5,504	2,045	—
7	83833	Harrison	-0.6%	1,365	695	—
8	83801	Athol	-0.8%	7,553	2,622	—
9	83814	Coeur D Alene	-1.5%	26,059	11,965	14,361
10	83876	Worley	-14.5%	1,563	622	798

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 11 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 53,704 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 83854 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 Kootenai County has the fastest population growth?: 83854 (Post Falls), at 28.6%, 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.