Oldest ZIP codes in Cook County, IL
These are the 25 ZIP codes in Cook County with the highest median age, out of 169 with at least 1,000 residents. 60464 (Palos Park, 56.1), 60154 (Westchester, 51.6) and 60467 (Orland Park, 50.1) lead the list. There is no single "best" ZIP code in Cook 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 Cook County
| Rank | ZIP | Mailing city | Median age | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 60464 | Palos Park | 56.1 ±4.2 | 9,773 | 4,006 | 4,048 |
| 2 | 60154 | Westchester | 51.6 ±3.3 | 16,436 | 6,908 | 7,099 |
| 3 | 60467 | Orland Park | 50.1 ±2.5 | 24,398 | 9,541 | 10,152 |
| 4 | 60463 | Palos Heights | 49.9 ±3.9 | 13,722 | 5,538 | 5,940 |
| 5 | 60062 | Northbrook | 49.5 ±1.4 | 41,406 | 16,135 | 17,897 |
| 6 | 60418 | Crestwood | 49.2 ±4.9 | 10,572 | 4,902 | 5,105 |
| 7 | 60714 | Niles | 48.3 ±3.1 | 30,305 | 11,549 | 12,715 |
| 8 | 60422 | Flossmoor | 47.6 ±4.3 | 9,542 | 3,592 | 3,669 |
| 9 | 60527 | Willowbrook | 47.5 ±3.1 | 29,028 | 12,137 | 12,504 |
| 10 | 60461 | Olympia Fields | 47.0 ±10.0 | 4,761 | 1,964 | 1,982 |
| 11 | 60026 | Glenview | 46.9 ±3.3 | 14,069 | 5,414 | 5,791 |
| 12 | 60025 | Glenview | 45.8 ±1.1 | 41,689 | 16,187 | 16,179 |
| 13 | 60010 | Barrington | 45.7 ±1.3 | 45,747 | 16,529 | 18,098 |
| 14 | 60712 | Lincolnwood | 45.6 ±3.1 | 13,112 | 4,621 | 5,221 |
| 15 | 60162 | Hillside | 45.5 ±4.7 | 8,084 | 3,170 | 3,086 |
| 16 | 60091 | Wilmette | 45.3 ±1.1 | 27,333 | 10,238 | 10,428 |
| 17 | 60192 | Hoffman Estates | 45.2 ±2.0 | 16,461 | 5,872 | 5,732 |
| 18 | 60439 | Lemont | 45.0 ±2.1 | 24,192 | 8,794 | 9,512 |
| 19 | 60007 | Elk Grove Village | 44.9 ±1.7 | 32,592 | 13,262 | 14,011 |
| 20 | 60022 | Glencoe | 44.9 ±2.7 | 8,352 | 2,851 | 3,016 |
| 21 | 60471 | Richton Park | 44.8 ±4.9 | 12,848 | 5,597 | 5,126 |
| 22 | 60053 | Morton Grove | 44.6 ±2.7 | 24,619 | 9,215 | 9,505 |
| 23 | 60068 | Park Ridge | 44.4 ±1.7 | 38,650 | 14,850 | 15,090 |
| 24 | 60706 | Harwood Heights | 44.3 ±2.2 | 24,260 | 9,404 | 9,628 |
| 25 | 60443 | Matteson | 44.1 ±3.4 | 20,663 | 8,319 | 8,089 |
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; 169 of 173 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 42,128 households, on 105 carrier routes with 45,136 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 60464 on the EDDM route map
More rankings
- Richest ZIP codes in Cook County
- ZIP codes with the highest home values in Cook County
- ZIP codes with the highest homeownership in Cook County
- ZIP codes with the most families with kids in Cook County
- ZIP codes with the most new movers in Cook County
- Youngest ZIP codes in Cook County
- Fastest-growing ZIP codes in Cook County
- All Cook County ZIP codes
Businesses that mail these ZIP codes
Map it and price it
EDDM guides
Frequently asked questions
- Which ZIP code in Cook County has the highest median age?
- 60464 (Palos Park), at 56.1 (±4.2), among 169 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.