Which ZIP code in Marion County has the highest median age?

46278 (Indianapolis), at 45.6 (±4.0), among 37 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Oldest ZIP codes in Marion County, IN

These are the 25 ZIP codes in Marion County with the highest median age, out of 37 with at least 1,000 residents. 46278 (Indianapolis, 45.6), 46228 (Indianapolis, 40.6) and 46236 (Indianapolis, 40.4) lead the list. There is no single "best" ZIP code in Marion County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Oldest ZIP codes in Marion County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	46278	Indianapolis	45.6 ±4.0	8,450	3,204	3,400
2	46228	Indianapolis	40.6 ±2.8	15,724	6,083	6,351
3	46236	Indianapolis	40.4 ±2.5	26,416	9,699	10,494
4	46231	Indianapolis	40.4 ±3.7	10,371	3,848	3,753
5	46216	Indianapolis	39.2 ±7.4	2,767	1,498	1,628
6	46256	Indianapolis	38.3 ±3.0	20,990	9,041	10,000
7	46234	Indianapolis	37.9 ±1.6	28,300	10,692	11,510
8	46259	Indianapolis	37.7 ±2.3	15,169	4,925	5,797
9	46237	Indianapolis	37.6 ±1.4	43,473	17,451	18,722
10	46240	Indianapolis	37.3 ±3.5	19,595	10,041	11,230
11	46268	Indianapolis	37.0 ±2.5	25,913	11,213	12,436
12	46217	Indianapolis	36.7 ±2.3	36,917	13,865	13,288
13	46229	Indianapolis	36.6 ±2.7	28,457	11,479	12,293
14	46260	Indianapolis	36.5 ±2.1	35,707	15,204	15,309
15	46250	Indianapolis	36.3 ±2.1	18,147	9,258	10,461
16	46107	Beech Grove	36.1 ±2.4	13,020	5,530	5,681
17	46220	Indianapolis	35.3 ±0.9	36,952	16,900	17,773
18	46219	Indianapolis	34.8 ±1.7	38,855	15,723	16,073
19	46201	Indianapolis	34.6 ±1.2	30,335	13,525	14,518
20	46203	Indianapolis	34.5 ±1.3	37,758	15,996	16,799
21	46218	Indianapolis	34.5 ±2.8	29,360	12,451	13,526
22	46221	Indianapolis	34.5 ±1.5	27,027	10,117	10,806
23	46214	Indianapolis	34.5 ±2.4	24,472	10,643	11,945
24	46205	Indianapolis	34.1 ±1.0	28,259	12,487	14,010
25	46113	Camby	34.1 ±1.8	17,192	6,109	6,878

How we ranked them

Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 37 of 39 qualify.

Which of these to mail, and why

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 24,332 households, on 45 carrier routes with 25,626 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 46278 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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EDDM guides

Frequently asked questions

Which ZIP code in Marion County has the highest median age?: 46278 (Indianapolis), at 45.6 (±4.0), among 37 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.