| ZIP Codes: | 12 ZIP Codes (11 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 620 / 785 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:13 PM |
| Population: | 11,550 [See All] |
| FIPS: | 20115 |
| Land Area: | 1,068 sq mi |
| Water Area: | 10 sq mi |
| Coordinates: | 38.3716, -97.0964 |
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11,550 residents live across 12 ZIPs covering 1,068 sq mi, served by 12 distinct USPS-recognized cities.
Population moved from 12,354 to 11,550 from 2014 to 2024 — a -6.5% change. 5 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 67073 (Lehigh, $86,875 median) and poorest ZIP 66851 (Florence, $48,162) are 26.0 miles apart — a 1.8× income gap across local geography.
Median home values vary 2.5× across this county — from $61,700 in 67438 (Durham) to $155,500 in 67063 (Hillsboro).
Density varies 585× across the county — from 3 people/sq mi in 66840 (Burns) to 1,597 in 67053 (Goessel).
Educational attainment ranges from 13.1% bachelor's+ in 66840 (Burns) to 41.5% in 67063 (Hillsboro) — the breadth of educational profiles across the area.
Within Kansas, this is the #37 most populous of 106 counties and ranks #57 for median household income .
Weighted by population, the typical household earns about $64,748 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 (2,352 of 7,871 reporting).
11 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
Marion County lost 6.5% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 67063 | Hillsboro | Standard | 3,470 | $72,083 | 142.1 | -7.7% |
| 66861 | Marion | Standard | 2,769 | $60,565 | 205.5 | -9.5% |
| 66866 | Peabody | Standard | 1,737 | $58,705 | 135.8 | 7.0% |
| 66851 | Florence | Standard | 659 | $48,162 | 82.4 | 3.5% |
| 67053 | Goessel | PO Box | 600 | $50,417 | 0.4 | 10.1% |
| 67483 | Tampa | Standard | 559 | $71,250 | 92.4 | 72.5% |
| 66840 | Burns | Standard | 474 | $56,111 | 173.6 | -32.6% |
| 66858 | Lincolnville | Standard | 428 | $76,563 | 81.5 | -28.2% |
| 67073 | Lehigh | Standard | 344 | $86,875 | 31.8 | 17.0% |
| 67438 | Durham | Standard | 226 | $74,531 | 62.2 | -43.8% |
| 66859 | Lost Springs | Standard | 158 | $80,000 | 32.5 | -4.8% |
| 67475 | Ramona | Standard | 126 | $59,375 | 27.7 | -48.8% |