| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 319 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:52 PM |
| Population: | 38,272 [See All] |
| FIPS: | 19057 |
| CBSA: | Burlington, IA-IL |
| Land Area: | 362 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 40.9044, -91.2219 |
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38,272 residents live across 7 ZIPs covering 362 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 40,216 to 38,272 from 2014 to 2024 — a -4.8% change. 4 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 52650 (Sperry, $105,255 median) and poorest ZIP 52655 (West Burlington, $52,500) are 7.4 miles apart — a 2.0× income gap across local geography.
Median home values vary 2.0× across this county — from $124,200 in 52601 (Burlington) to $247,500 in 52650 (Sperry).
Density varies 20× across the county — from 11 people/sq mi in 52660 (Yarmouth) to 214 in 52601 (Burlington).
Educational attainment ranges from 12.8% bachelor's+ in 52638 (Middletown) to 29.1% in 52637 (Mediapolis) — the breadth of educational profiles across the area.
Within Iowa, this is the #16 most populous of 99 counties and ranks #41 for median household income .
Weighted by population, the typical household earns about $64,116 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.8% of adults age 25+ hold a bachelor's degree or higher (6,421 of 26,939 reporting).
7 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 52601 | Burlington | Standard | 27,341 | $60,983 | 127.9 | -8.3% |
| 52655 | West Burlington | Standard | 4,322 | $52,500 | 22.8 | -5.9% |
| 52637 | Mediapolis | Standard | 3,041 | $81,477 | 73.7 | 23.8% |
| 52623 | Danville | Standard | 1,982 | $90,714 | 57.6 | -2.4% |
| 52650 | Sperry | Standard | 799 | $105,255 | 39.7 | 15.6% |
| 52638 | Middletown | Standard | 508 | $59,167 | 15.0 | 1.6% |
| 52660 | Yarmouth | Standard | 279 | — | 25.6 | 103.6% |