ZIP Code 60073 — Round Lake, IL
60073 is a standard (street delivery) ZIP code serving Round Lake, Illinois, in Lake 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 60073 at a glance
| ZIP code | 60073 |
|---|---|
| Primary city | Round Lake |
| State | Illinois (IL) |
| County | Lake FIPS 17097 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 62,868 |
| Coordinates | 42.351600, -88.105970 |
How ZIP+4 works in 60073
The four digits after the hyphen encode a delivery segment inside 60073. 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 60073 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 60073.
| ZIP | City | Distance |
|---|---|---|
| 60041 | Ingleside, IL | 2.7 mi |
| 60030 | Grayslake, IL | 3.3 mi |
| 60020 | Fox Lake, IL | 4.6 mi |
| 60046 | Lake Villa, IL | 5 mi |
| 60051 | Mchenry, IL | 6 mi |
| 60084 | Wauconda, IL | 6 mi |
| 60060 | Mundelein, IL | 6.6 mi |
| 60042 | Island Lake, IL | 6.8 mi |
| 60002 | Antioch, IL | 8 mi |
| 60031 | Gurnee, IL | 8.6 mi |
| 60048 | Libertyville, IL | 9 mi |
| 60081 | Spring Grove, IL | 9.1 mi |
Questions about 60073
What is the ZIP+4 code for 60073?
60073 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 60073, you need to look up a specific street address to get them.
What city is 60073?
60073 is assigned to Round Lake, Illinois, in Lake 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.