| ZIP Codes: | 17 ZIP Codes (16 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 712 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:54 PM |
| Population: | 92,784 [See All] |
| FIPS: | 19155 |
| CBSA: | Omaha, NE-IA |
| Land Area: | 888 sq mi |
| Water Area: | 7 sq mi |
| Coordinates: | 41.3336, -95.6212 |
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92,784 residents live across 17 ZIPs covering 888 sq mi, served by 15 distinct USPS-recognized cities.
Population moved from 92,847 to 92,784 from 2014 to 2024 — a -0.1% change. 7 ZIPs gained residents, 9 lost.
The county's wealthiest ZIP 51542 (Honey Creek, $118,165 median) and poorest ZIP 51501 (Council Bluffs, $59,843) are 13.8 miles apart — a 2.0× income gap across local geography.
Median home values vary 2.8× across this county — from $134,100 in 51577 (Walnut) to $381,500 in 51542 (Honey Creek).
Density varies 162× across the county — from 12 people/sq mi in 51536 (Hancock) to 1,905 in 51510 (Carter Lake).
Educational attainment ranges from 9.5% bachelor's+ in 51510 (Carter Lake) to 43.1% in 51542 (Honey Creek) — the breadth of educational profiles across the area.
Within Iowa, this is the #9 most populous of 99 counties and ranks #9 for median household income .
Weighted by population, the typical household earns about $74,045 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.7% of adults age 25+ hold a bachelor's degree or higher (15,080 of 63,761 reporting).
16 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 51503 | Council Bluffs | Standard | 37,972 | $79,010 | 122.5 | 1.6% |
| 51501 | Council Bluffs | Standard | 34,618 | $59,843 | 26.7 | -0.7% |
| 51510 | Carter Lake | Standard | 3,767 | $85,349 | 2.0 | -0.1% |
| 51521 | Avoca | Standard | 1,953 | $73,769 | 89.7 | 5.2% |
| 51559 | Neola | Standard | 1,841 | $74,761 | 84.4 | 11.8% |
| 51560 | Oakland | Standard | 1,772 | $75,481 | 91.0 | -25.3% |
| 51576 | Underwood | Standard | 1,769 | $110,476 | 45.6 | -19.1% |
| 51526 | Crescent | Standard | 1,664 | $95,179 | 43.6 | 26.5% |
| 51575 | Treynor | Standard | 1,609 | $112,115 | 50.6 | -6.6% |
| 51577 | Walnut | Standard | 1,561 | $71,518 | 78.6 | 25.2% |
| 51525 | Carson | Standard | 1,067 | $82,308 | 59.9 | -4.2% |
| 51553 | Minden | Standard | 998 | $96,932 | 43.8 | -19.0% |
| 51542 | Honey Creek | Standard | 802 | $118,165 | 39.3 | -20.0% |
| 51536 | Hancock | Standard | 613 | $101,750 | 52.0 | 47.7% |
| 51548 | Mc Clelland | Standard | 415 | $114,583 | 27.0 | 21.0% |
| 51549 | Macedonia | Standard | 363 | $72,500 | 31.7 | -8.3% |
| 51502 | Council Bluffs | PO Box | — | — | 0.0 | — |