ZIP Code 95637 — Guinda, CA
95637 is a standard (street delivery) ZIP code serving Guinda, California, in Yolo 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 95637 at a glance
| ZIP code | 95637 |
|---|---|
| Primary city | Guinda |
| State | California (CA) |
| County | Yolo FIPS 06113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 402 |
| Coordinates | 38.852830, -122.272900 |
How ZIP+4 works in 95637
The four digits after the hyphen encode a delivery segment inside 95637. 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 95637 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 95637.
| ZIP | City | Distance |
|---|---|---|
| 95679 | Rumsey, CA | 3.6 mi |
| 95606 | Brooks, CA | 7.9 mi |
| 95607 | Capay, CA | 9 mi |
| 95457 | Lower Lake, CA | 13.8 mi |
| 95912 | Arbuckle, CA | 14.8 mi |
| 95937 | Dunnigan, CA | 14.9 mi |
| 95467 | Hidden Valley Lake, CA | 15.2 mi |
| 94567 | Pope Valley, CA | 15.7 mi |
| 95627 | Esparto, CA | 16.5 mi |
| 95987 | Williams, CA | 17.3 mi |
| 95461 | Middletown, CA | 18.3 mi |
| 95653 | Madison, CA | 19.4 mi |
Questions about 95637
What is the ZIP+4 code for 95637?
95637 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 95637, you need to look up a specific street address to get them.
What city is 95637?
95637 is assigned to Guinda, California, in Yolo 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.