| ZIP Codes: | 16 ZIP Codes (13 Standard, 2 PO Box, 1 Unique) [See All] |
| Area Codes: | 317 / 463 / 765 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:53:24 PM |
| Population: | 350,555 [See All] |
| FIPS: | 18057 |
| CBSA: | Indianapolis-Carmel-Greenwood, IN |
| Land Area: | 439 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 40.0317, -86.0744 |
| Quick Link: |
350,555 residents live across 16 ZIPs covering 439 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 282,504 to 350,555 from 2014 to 2024 — a +24.1% change. 12 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 46033 (Carmel, $153,143 median) and poorest ZIP 46031 (Atlanta, $76,438) are 16.3 miles apart — a 2.0× income gap across local geography.
Median home values vary 2.2× across this county — from $227,900 in 46031 (Atlanta) to $496,800 in 46032 (Carmel).
Density varies 61× across the county — from 48 people/sq mi in 46031 (Atlanta) to 2,973 in 46038 (Fishers).
Educational attainment ranges from 29.0% bachelor's+ in 46031 (Atlanta) to 75.5% in 46032 (Carmel) — the breadth of educational profiles across the area.
Within Indiana, this is the #4 most populous of 92 counties and ranks #1 for median household income with the #2 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 46085Newgistics Merchandise Retrn .
Weighted by population, the typical household earns about $121,459 across the county — reflecting what a typical resident sees, not a simple ZIP average.
61.2% of adults age 25+ hold a bachelor's degree or higher (143,601 of 234,489 reporting). The most-educated ZIPs cluster around Carmel.
13 Standard delivery, 2 PO Box only, 1 single-entity Unique ZIPs serve this county.
6 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Hamilton County grew 24.1% over the past decade — concentrated in 4 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 46032 | Carmel | Standard | 51,515 | $132,085 | 25.9 | 19.9% |
| 46074 | Westfield | Standard | 48,901 | $126,724 | 38.9 | 64.2% |
| 46037 | Fishers | Standard | 48,713 | $141,810 | 21.2 | 28.6% |
| 46060 | Noblesville | Standard | 47,610 | $91,918 | 81.1 | 29.0% |
| 46038 | Fishers | Standard | 43,754 | $106,886 | 14.7 | 10.0% |
| 46062 | Noblesville | Standard | 41,060 | $120,100 | 33.7 | 28.5% |
| 46033 | Carmel | Standard | 40,881 | $153,143 | 18.4 | 12.0% |
| 46034 | Cicero | Standard | 7,531 | $91,466 | 33.6 | 2.4% |
| 46280 | Indianapolis | Standard | 7,514 | $91,152 | 3.9 | 9.6% |
| 46069 | Sheridan | Standard | 7,504 | $76,990 | 84.7 | 6.4% |
| 46030 | Arcadia | Standard | 3,035 | $90,536 | 31.9 | 2.9% |
| 46031 | Atlanta | Standard | 2,456 | $76,438 | 50.8 | 8.0% |
| 46290 | Indianapolis | Standard | 81 | — | 0.5 | -64.9% |
| 46085 | Fishers | Unique | — | — | 0.0 | — |
| 46082 | Carmel | PO Box | — | — | 0.0 | — |
| 46061 | Noblesville | PO Box | — | — | 0.0 | — |