| ZIP Codes: | 6 ZIP Codes (5 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 317 / 463 / 765 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:05 PM |
| Population: | 75,802 [See All] |
| FIPS: | 18011 |
| CBSA: | Indianapolis-Carmel-Greenwood, IN |
| Land Area: | 383 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 40.0236, -86.4946 |
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75,802 residents live across 6 ZIPs covering 383 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 59,340 to 75,412 from 2014 to 2024 — a +27.1% change. 3 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 46077 (Zionsville, $177,679 median) and poorest ZIP 46102 (Advance, $64,500) are 17.7 miles apart — a 2.8× income gap across local geography.
Median home values vary 3.5× across this county — from $164,500 in 46102 (Advance) to $580,600 in 46077 (Zionsville).
Density varies 18× across the county — from 44 people/sq mi in 46071 (Thorntown) to 812 in 46077 (Zionsville).
Educational attainment ranges from 25.6% bachelor's+ in 46052 (Lebanon) to 74.1% in 46077 (Zionsville) — the breadth of educational profiles across the area.
Within Indiana, this is the #24 most populous of 92 counties and ranks #4 for median household income with the #1 fastest decade growth .
On the national stage, Boone County is and #73 for decade growth .
Weighted by population, the typical household earns about $128,718 across the county — reflecting what a typical resident sees, not a simple ZIP average.
53.0% of adults age 25+ hold a bachelor's degree or higher (26,672 of 50,336 reporting).
5 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Boone County grew 27.7% over the past decade — concentrated in 2 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 46077 | Zionsville | Standard | 36,760 | $177,679 | 45.3 | 38.8% |
| 46052 | Lebanon | Standard | 23,553 | $68,930 | 182.5 | 7.6% |
| 46075 | Whitestown | Standard | 9,509 | $117,002 | 30.3 | 170.0% |
| 46071 | Thorntown | Standard | 3,072 | $85,000 | 69.2 | -21.4% |
| 46147 | Jamestown | Standard | 2,518 | $80,707 | 55.0 | -28.8% |
| 46102 | Advance | PO Box | 390 | $64,500 | 0.6 | — |