| ZIP Codes: | 11 ZIP Codes (10 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 223 / 717 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:31 PM |
| Population: | 22,066 [See All] |
| FIPS: | 42067 |
| Land Area: | 375 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 40.5506, -77.3683 |
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22,066 residents live across 11 ZIPs covering 375 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 23,536 to 21,892 from 2014 to 2024 — a -7.0% change. 3 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 17082 (Port Royal, $75,000 median) and poorest ZIP 17035 (Honey Grove, $47,500) are 10.0 miles apart — a 1.6× income gap across local geography.
Median home values vary 1.1× across this county — from $194,200 in 17086 (Richfield) to $223,000 in 17059 (Mifflintown).
Density varies 9× across the county — from 17 people/sq mi in 17021 (East Waterford) to 147 in 17014 (Cocolamus).
Educational attainment ranges from 1.4% bachelor's+ in 17014 (Cocolamus) to 18.0% in 17059 (Mifflintown) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #61 most populous of 67 counties and ranks #61 for median household income .
Weighted by population, the typical household earns about $64,959 across the county — reflecting what a typical resident sees, not a simple ZIP average.
14.5% of adults age 25+ hold a bachelor's degree or higher (2,260 of 15,632 reporting).
10 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 |
|---|---|---|---|---|---|---|
| 17059 | Mifflintown | Standard | 8,013 | $64,970 | 83.3 | 0.7% |
| 17049 | Mc Alisterville | Standard | 3,046 | $70,109 | 38.2 | -6.2% |
| 17082 | Port Royal | Standard | 3,046 | $75,000 | 58.8 | -15.1% |
| 17094 | Thompsontown | Standard | 2,424 | $66,375 | 31.2 | -15.7% |
| 17086 | Richfield | Standard | 1,982 | $61,875 | 35.9 | -12.0% |
| 17058 | Mifflin | Standard | 1,578 | $49,125 | 34.3 | -13.3% |
| 17021 | East Waterford | Standard | 912 | $61,000 | 55.2 | 6.4% |
| 17035 | Honey Grove | Standard | 864 | $47,500 | 36.6 | 5.2% |
| 17014 | Cocolamus | Standard | 174 | — | 1.2 | — |
| 17056 | Mexico | PO Box | 27 | — | 0.0 | -68.2% |
| 17076 | Oakland Mills | Standard | 0 | — | 0.5 | -100.0% |