| ZIP Codes: | 14 ZIP Codes (12 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 208 / 986 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:11:57 PM |
| Population: | 184,878 [See All] |
| FIPS: | 16055 |
| CBSA: | Coeur d'Alene, ID |
| Land Area: | 1,339 sq mi |
| Water Area: | 122 sq mi |
| Coordinates: | 47.7123, -116.7482 |
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184,878 residents live across 14 ZIPs covering 1,339 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 144,496 to 184,878 from 2014 to 2024 — a +27.9% change. 10 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 83810 (Cataldo, $132,344 median) and poorest ZIP 83876 (Worley, $60,729) are 23.3 miles apart — a 2.2× income gap across local geography.
Median home values vary 1.3× across this county — from $466,000 in 83869 (Spirit Lake) to $612,500 in 83801 (Athol).
Density varies 364× across the county — from 7 people/sq mi in 83810 (Cataldo) to 2,618 in 83815 (Coeur D Alene).
Educational attainment ranges from 20.1% bachelor's+ in 83869 (Spirit Lake) to 43.8% in 83833 (Harrison) — the breadth of educational profiles across the area.
Within Idaho, this is the #3 most populous of 46 counties and ranks #6 for median household income with the #5 fastest decade growth .
On the national stage, Kootenai County is and #71 for decade growth .
Weighted by population, the typical household earns about $82,201 across the county — reflecting what a typical resident sees, not a simple ZIP average.
29.9% of adults age 25+ hold a bachelor's degree or higher (38,823 of 129,913 reporting).
12 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
Kootenai County grew 27.9% over the past decade — concentrated in 5 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 83854 | Post Falls | Standard | 54,851 | $82,742 | 81.1 | 43.7% |
| 83815 | Coeur D Alene | Standard | 41,405 | $77,864 | 15.8 | 30.7% |
| 83814 | Coeur D Alene | Standard | 26,059 | $74,782 | 235.5 | 2.3% |
| 83835 | Hayden | Standard | 24,238 | $91,316 | 90.7 | 19.2% |
| 83858 | Rathdrum | Standard | 20,137 | $95,380 | 115.1 | 44.7% |
| 83801 | Athol | Standard | 7,553 | $71,108 | 235.6 | 29.1% |
| 83869 | Spirit Lake | Standard | 5,504 | $67,099 | 68.8 | 26.1% |
| 83876 | Worley | Standard | 1,563 | $60,729 | 128.0 | -3.1% |
| 83810 | Cataldo | Standard | 1,412 | $132,344 | 196.3 | 11.9% |
| 83833 | Harrison | Standard | 1,365 | $81,568 | 140.2 | 27.6% |
| 83803 | Bayview | Standard | 650 | $60,818 | 8.6 | 10.5% |
| 83842 | Medimont | Standard | 141 | $91,429 | 23.6 | -9.0% |
| 83877 | Post Falls | PO Box | — | — | 0.0 | — |
| 83816 | Coeur D Alene | PO Box | — | — | 0.0 | — |