| ZIP Codes: | 15 ZIP Codes (9 Standard, 6 PO Box, 0 Unique) [See All] |
| Area Codes: | 317 / 463 / 765 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:06 PM |
| Population: | 49,612 [See All] |
| FIPS: | 18065 |
| CBSA: | New Castle, IN |
| Land Area: | 403 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 39.9123, -85.4162 |
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49,612 residents live across 15 ZIPs covering 403 sq mi, served by 15 distinct USPS-recognized cities.
Population moved from 50,751 to 49,586 from 2014 to 2024 — a -2.3% change. 5 ZIPs gained residents, 9 lost.
The county's wealthiest ZIP 47385 (Spiceland, $103,406 median) and poorest ZIP 47388 (Sulphur Springs, $48,125) are 11.8 miles apart — a 2.1× income gap across local geography.
Median home values vary 1.9× across this county — from $110,100 in 47351 (Kennard) to $211,200 in 47385 (Spiceland).
Density varies 744× across the county — from 29 people/sq mi in 47352 (Lewisville) to 21,680 in 47361 (Mount Summit).
Educational attainment ranges from 12.9% bachelor's+ in 47387 (Straughn) to 37.2% in 47388 (Sulphur Springs) — the breadth of educational profiles across the area.
Within Indiana, this is the #29 most populous of 92 counties and ranks #59 for median household income .
Weighted by population, the typical household earns about $64,771 across the county — reflecting what a typical resident sees, not a simple ZIP average.
17.7% of adults age 25+ hold a bachelor's degree or higher (6,303 of 35,517 reporting).
9 Standard delivery, 6 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 47362 | New Castle | Standard | 29,337 | $60,258 | 148.7 | -0.9% |
| 47356 | Middletown | Standard | 5,522 | $67,049 | 54.8 | -6.5% |
| 46148 | Knightstown | Standard | 4,935 | $63,914 | 51.6 | -5.2% |
| 47384 | Shirley | Standard | 2,161 | $74,167 | 31.1 | 12.1% |
| 47385 | Spiceland | Standard | 1,714 | $103,406 | 14.4 | -17.4% |
| 47360 | Mooreland | Standard | 1,643 | $76,250 | 33.3 | 11.5% |
| 47386 | Springport | Standard | 1,249 | $79,157 | 16.7 | -13.6% |
| 47352 | Lewisville | Standard | 974 | $66,250 | 33.4 | -4.0% |
| 47387 | Straughn | Standard | 603 | $86,818 | 18.5 | -11.7% |
| 47388 | Sulphur Springs | PO Box | 398 | $48,125 | 0.1 | -8.1% |
| 47351 | Kennard | PO Box | 397 | $57,813 | 0.3 | -23.1% |
| 47361 | Mount Summit | PO Box | 271 | $53,333 | 0.0 | 100.7% |
| 47337 | Dunreith | PO Box | 204 | $57,250 | 0.1 | 0.5% |
| 47344 | Greensboro | PO Box | 178 | — | 0.1 | 36.9% |
| 47366 | New Lisbon | PO Box | 26 | — | 0.0 | — |