ZIP Code 60056 — Mount Prospect, IL
60056 is a standard (street delivery) ZIP code serving Mount Prospect, Illinois, in Cook County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 60056 at a glance
| ZIP code | 60056 |
|---|---|
| Primary city | Mount Prospect |
| State | Illinois (IL) |
| County | Cook FIPS 17031 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 55,818 |
| Coordinates | 42.066180, -87.934730 |
How ZIP+4 works in 60056
The four digits after the hyphen encode a delivery segment inside 60056. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 60056 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 60056.
| ZIP | City | Distance |
|---|---|---|
| 60016 | Des Plaines, IL | 2.5 mi |
| 60070 | Prospect Heights, IL | 2.6 mi |
| 60005 | Arlington Heights, IL | 2.7 mi |
| 60004 | Arlington Heights, IL | 3.9 mi |
| 60090 | Wheeling, IL | 4.5 mi |
| 60008 | Rolling Meadows, IL | 4.5 mi |
| 60007 | Elk Grove Village, IL | 4.8 mi |
| 60018 | Des Plaines, IL | 5.2 mi |
| 60026 | Glenview, IL | 5.3 mi |
| 60068 | Park Ridge, IL | 5.9 mi |
| 60173 | Schaumburg, IL | 6.1 mi |
| 60025 | Glenview, IL | 6.3 mi |
Questions about 60056
What is the ZIP+4 code for 60056?
60056 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 60056, you need to look up a specific street address to get them.
What city is 60056?
60056 is assigned to Mount Prospect, Illinois, in Cook County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.