ZIP Code 42166 — Summer Shade, KY
42166 is a standard (street delivery) ZIP code serving Summer Shade, Kentucky, in Metcalfe 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 42166 at a glance
| ZIP code | 42166 |
|---|---|
| Primary city | Summer Shade |
| State | Kentucky (KY) |
| County | Metcalfe FIPS 21169 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,691 |
| Coordinates | 36.877680, -85.715030 |
How ZIP+4 works in 42166
The four digits after the hyphen encode a delivery segment inside 42166. 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 42166 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 42166.
| ZIP | City | Distance |
|---|---|---|
| 42124 | Beaumont, KY | 3.8 mi |
| 42130 | Eighty Eight, KY | 4.7 mi |
| 42157 | Mount Hermon, KY | 8.4 mi |
| 42129 | Edmonton, KY | 10.4 mi |
| 42167 | Tompkinsville, KY | 10.9 mi |
| 42131 | Etoile, KY | 11.3 mi |
| 42759 | Marrowbone, KY | 11.6 mi |
| 42154 | Knob Lick, KY | 11.8 mi |
| 42141 | Glasgow, KY | 12.1 mi |
| 42123 | Austin, KY | 16 mi |
| 42140 | Gamaliel, KY | 16.6 mi |
| 42133 | Fountain Run, KY | 17 mi |
Questions about 42166
What is the ZIP+4 code for 42166?
42166 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 42166, you need to look up a specific street address to get them.
What city is 42166?
42166 is assigned to Summer Shade, Kentucky, in Metcalfe 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.