| ZIP Codes: | 18 ZIP Codes (12 Standard, 5 PO Box, 1 Unique) [See All] |
| Area Codes: | 223 / 717 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:29 PM |
| Population: | 100,324 [See All] |
| FIPS: | 42001 |
| CBSA: | Gettysburg, PA |
| Land Area: | 541 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 39.9165, -77.2036 |
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100,324 residents live across 18 ZIPs covering 541 sq mi, served by 18 distinct USPS-recognized cities.
Population moved from 96,933 to 99,929 from 2014 to 2024 — a +3.1% change. 10 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 17353 (Orrtanna, $100,150 median) and poorest ZIP 17344 (Mc Sherrystown, $65,833) are 21.7 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.5× across this county — from $193,500 in 17344 (Mc Sherrystown) to $298,000 in 17340 (Littlestown).
Density varies 174× across the county — from 70 people/sq mi in 17353 (Orrtanna) to 12,122 in 17306 (Bendersville).
Educational attainment ranges from 15.4% bachelor's+ in 17324 (Gardners) to 35.3% in 17325 (Gettysburg) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #31 most populous of 67 counties and ranks #14 for median household income .
Hosts 1 single-entity Unique ZIP: 17375Knouse Foods .
Weighted by population, the typical household earns about $83,905 across the county — reflecting what a typical resident sees, not a simple ZIP average.
25.6% of adults age 25+ hold a bachelor's degree or higher (18,030 of 70,532 reporting).
12 Standard delivery, 5 PO Box only, 1 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 17325 | Gettysburg | Standard | 30,373 | $80,948 | 128.2 | 7.6% |
| 17350 | New Oxford | Standard | 13,169 | $79,401 | 43.9 | 2.4% |
| 17340 | Littlestown | Standard | 11,405 | $90,030 | 39.0 | 3.6% |
| 17316 | East Berlin | Standard | 8,497 | $90,664 | 41.9 | 0.7% |
| 17320 | Fairfield | Standard | 8,124 | $90,076 | 58.5 | 2.6% |
| 17307 | Biglerville | Standard | 5,467 | $88,571 | 57.6 | -10.5% |
| 17324 | Gardners | Standard | 4,433 | $77,824 | 59.1 | 8.3% |
| 17301 | Abbottstown | Standard | 4,133 | $84,712 | 11.9 | 6.8% |
| 17372 | York Springs | Standard | 4,045 | $82,313 | 33.7 | -6.0% |
| 17344 | Mc Sherrystown | Standard | 3,719 | $65,833 | 0.7 | 4.6% |
| 17304 | Aspers | Standard | 3,171 | $84,885 | 25.7 | 7.3% |
| 17353 | Orrtanna | Standard | 2,825 | $100,150 | 40.6 | -11.6% |
| 17306 | Bendersville | PO Box | 537 | $75,000 | 0.0 | 46.3% |
| 17303 | Arendtsville | PO Box | 395 | $81,905 | 0.0 | — |
| 17343 | Mc Knightstown | PO Box | 31 | — | 0.0 | -11.4% |
| 17310 | Cashtown | PO Box | — | — | 0.0 | — |
| 17337 | Idaville | PO Box | — | — | 0.0 | — |
| 17375 | Peach Glen | Unique | — | — | 0.0 | — |