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

60523 (Oak Brook), at 57.1 (±1.6), among 39 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 DuPage County, IL

These are the 25 ZIP codes in DuPage County with the highest median age, out of 39 with at least 1,000 residents. 60523 (Oak Brook, 57.1), 60184 (Wayne, 49.2) and 60527 (Willowbrook, 47.5) lead the list. There is no single "best" ZIP code in DuPage 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 DuPage County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	60523	Oak Brook	57.1 ±1.6	10,144	4,433	5,222
2	60184	Wayne	49.2 ±5.7	2,557	956	764
3	60527	Willowbrook	47.5 ±3.1	29,028	12,137	12,504
4	60157	Medinah	46.7 ±13.2	2,577	955	853
5	60439	Lemont	45.0 ±2.1	24,192	8,794	9,512
6	60561	Darien	44.2 ±2.4	23,069	9,193	9,695
7	60515	Downers Grove	44.0 ±1.9	29,762	12,288	12,487
8	60516	Downers Grove	43.6 ±2.0	28,062	11,227	12,012
9	60190	Winfield	43.5 ±3.2	11,826	4,545	4,620
10	60559	Westmont	42.8 ±2.4	24,231	10,583	10,216
11	60108	Bloomingdale	42.8 ±2.3	23,604	9,339	9,473
12	60565	Naperville	42.7 ±1.7	40,483	14,079	14,090
13	60143	Itasca	42.7 ±2.0	11,324	4,443	4,361
14	60172	Roselle	42.5 ±2.1	24,141	9,130	10,013
15	60126	Elmhurst	42.4 ±1.2	47,516	17,598	17,171
16	60521	Hinsdale	42.3 ±1.3	18,056	6,042	6,397
17	60191	Wood Dale	42.3 ±2.9	14,396	5,488	5,610
18	60510	Batavia	41.9 ±1.4	29,038	11,263	11,502
19	60514	Clarendon Hills	41.8 ±3.2	9,918	3,866	3,957
20	60540	Naperville	41.5 ±1.3	42,252	15,161	16,445
21	60564	Naperville	41.0 ±1.7	47,016	15,873	16,277
22	60103	Bartlett	41.0 ±0.9	41,382	14,392	15,034
23	60189	Wheaton	40.9 ±1.4	31,042	11,846	12,091
24	60101	Addison	40.6 ±1.6	37,448	13,557	13,498
25	60106	Bensenville	40.4 ±2.5	20,045	7,565	6,986

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; 39 of 40 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 27,275 households, on 58 carrier routes with 28,855 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 60523 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in DuPage County has the highest median age?: 60523 (Oak Brook), at 57.1 (±1.6), among 39 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.