| ZIP Codes: | 56 ZIP Codes (37 Standard, 9 PO Box, 10 Unique) [See All] |
| Area Codes: | 317 / 463 / 765 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:53:25 PM |
| Population: | 989,752 [See All] |
| FIPS: | 18097 |
| CBSA: | Indianapolis-Carmel-Greenwood, IN |
| Land Area: | 419 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 39.7857, -86.1556 |
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989,752 residents live across 56 ZIPs covering 419 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 933,033 to 989,752 from 2014 to 2024 — a +6.1% change. 25 ZIPs gained residents, 12 lost.
The county's wealthiest ZIP 46278 (Indianapolis, $158,648 median) and poorest ZIP 46218 (Indianapolis, $38,063) are 11.9 miles apart — a 4.2× income gap across local geography.
Median home values vary 4.3× across this county — from $103,100 in 46218 (Indianapolis) to $439,200 in 46202 (Indianapolis).
Density varies 18× across the county — from 627 people/sq mi in 46278 (Indianapolis) to 11,032 in 46204 (Indianapolis).
Most of the decade's growth concentrated around Indianapolis — top growth ZIPs averaged +56.5% over the past ten years ( 46204 , 46216 and 46259 ).
Educational attainment ranges from 11.8% bachelor's+ in 46218 (Indianapolis) to 68.1% in 46220 (Indianapolis) — the breadth of educational profiles across the area.
Within Indiana, this is the #1 most populous of 92 counties and ranks #42 for median household income with the #15 fastest decade growth .
On the national stage, Marion County is the #51 most populous US county .
Hosts 4 single-entity Unique ZIPs: 46249Fort Benjamin Harrison ; 46283Indianapolis ; 46255Merchants Bank ; and 46277Indianapolis .
Weighted by population, the typical household earns about $69,874 across the county — reflecting what a typical resident sees, not a simple ZIP average.
35.1% of adults age 25+ hold a bachelor's degree or higher (227,856 of 649,607 reporting). The most-educated ZIPs cluster around Indianapolis.
37 Standard delivery, 9 PO Box only, 10 single-entity Unique ZIPs serve this county.
5 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
10 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 4.2× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 46227 | Indianapolis | Standard | 57,587 | $53,629 | 16.7 | -0.6% |
| 46226 | Indianapolis | Standard | 47,099 | $50,325 | 14.7 | 2.8% |
| 46237 | Indianapolis | Standard | 43,473 | $79,078 | 14.6 | 6.9% |
| 46254 | Indianapolis | Standard | 40,674 | $60,287 | 14.0 | 6.3% |
| 46224 | Indianapolis | Standard | 40,228 | $55,986 | 7.8 | 13.3% |
| 46222 | Indianapolis | Standard | 38,887 | $50,783 | 10.7 | 14.7% |
| 46219 | Indianapolis | Standard | 38,855 | $60,803 | 13.1 | 11.6% |
| 46203 | Indianapolis | Standard | 37,758 | $57,393 | 13.8 | -0.6% |
| 46220 | Indianapolis | Standard | 36,952 | $108,050 | 12.3 | 6.9% |
| 46217 | Indianapolis | Standard | 36,917 | $92,029 | 22.5 | 23.5% |
| 46235 | Indianapolis | Standard | 36,317 | $58,951 | 8.9 | 13.6% |
| 46260 | Indianapolis | Standard | 35,707 | $72,504 | 10.4 | 8.4% |
| 46239 | Indianapolis | Standard | 33,931 | $100,331 | 28.1 | 24.8% |
| 46241 | Indianapolis | Standard | 32,565 | $53,653 | 25.1 | 4.6% |
| 46201 | Indianapolis | Standard | 30,335 | $49,195 | 5.7 | -2.4% |
| 46218 | Indianapolis | Standard | 29,360 | $38,063 | 9.5 | 0.8% |
| 46229 | Indianapolis | Standard | 28,457 | $61,388 | 11.1 | 1.7% |
| 46234 | Indianapolis | Standard | 28,300 | $83,190 | 13.1 | 5.1% |
| 46205 | Indianapolis | Standard | 28,259 | $72,417 | 6.5 | 2.9% |
| 46221 | Indianapolis | Standard | 27,027 | $65,280 | 20.7 | 2.7% |
| 46236 | Indianapolis | Standard | 26,416 | $115,664 | 12.5 | -1.7% |
| 46268 | Indianapolis | Standard | 25,913 | $68,631 | 12.6 | -0.5% |
| 46214 | Indianapolis | Standard | 24,472 | $59,178 | 7.6 | -1.8% |
| 46208 | Indianapolis | Standard | 22,379 | $60,062 | 6.7 | -0.8% |
| 46256 | Indianapolis | Standard | 20,990 | $93,847 | 12.2 | -8.0% |
| 46202 | Indianapolis | Standard | 20,180 | $63,506 | 5.6 | 20.9% |
| 46240 | Indianapolis | Standard | 19,595 | $75,156 | 10.8 | -1.2% |
| 46250 | Indianapolis | Standard | 18,147 | $67,328 | 8.2 | 1.7% |
| 46228 | Indianapolis | Standard | 15,724 | $91,156 | 8.3 | 3.1% |
| 46259 | Indianapolis | Standard | 15,169 | $129,345 | 22.9 | 27.7% |
| 46107 | Beech Grove | Standard | 13,020 | $56,799 | 3.5 | 2.9% |
| 46204 | Indianapolis | Standard | 11,400 | $86,396 | 1.0 | 80.7% |
| 46231 | Indianapolis | Standard | 10,371 | $71,825 | 7.4 | -8.3% |
| 46278 | Indianapolis | Standard | 8,450 | $158,648 | 13.5 | 12.6% |
| 46225 | Indianapolis | Standard | 6,037 | $55,190 | 4.2 | -14.9% |
| 46216 | Indianapolis | Standard | 2,767 | $53,161 | 2.8 | 61.1% |
| 46183 | West Newton | PO Box | 34 | — | 0.1 | -86.2% |
| 46206 | Indianapolis | PO Box | 0 | — | 0.0 | — |
| 46255 | Indianapolis | Unique | — | — | 0.0 | — |
| 46277 | Indianapolis | Unique | — | — | 0.0 | — |
| 46282 | Indianapolis | Standard | — | — | 0.0 | — |
| 46242 | Indianapolis | PO Box | — | — | 0.0 | — |
| 46251 | Indianapolis | PO Box | — | — | 0.0 | — |
| 46244 | Indianapolis | PO Box | — | — | 0.0 | — |
| 46247 | Indianapolis | PO Box | — | — | 0.0 | — |
| 46213 | Indianapolis | Unique | — | — | 0.0 | — |
| 46285 | Indianapolis | Unique | — | — | 0.0 | — |
| 46288 | Indianapolis | Unique | — | — | 0.0 | — |
| 46262 | Indianapolis | Unique | — | — | 0.0 | — |
| 46207 | Indianapolis | PO Box | — | — | 0.0 | — |
| 46209 | Indianapolis | Unique | — | — | 0.0 | — |
| 46283 | Indianapolis | Unique | — | — | 0.0 | — |
| 46298 | Indianapolis | Unique | — | — | 0.0 | — |
| 46230 | Indianapolis | PO Box | — | — | 0.0 | — |
| 46249 | Indianapolis | Unique | — | — | 0.1 | — |
| 46253 | Indianapolis | PO Box | — | — | 0.0 | — |