ZIP Code 95987 — Williams, CA
95987 is a standard (street delivery) ZIP code serving Williams, California, in Colusa 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 95987 at a glance
| ZIP code | 95987 |
|---|---|
| Primary city | Williams |
| State | California (CA) |
| County | Colusa FIPS 06011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 6,786 |
| Coordinates | 39.102990, -122.272600 |
How ZIP+4 works in 95987
The four digits after the hyphen encode a delivery segment inside 95987. 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 95987 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 95987.
| ZIP | City | Distance |
|---|---|---|
| 95912 | Arbuckle, CA | 12.7 mi |
| 95679 | Rumsey, CA | 13.6 mi |
| 95955 | Maxwell, CA | 13.8 mi |
| 95637 | Guinda, CA | 17.3 mi |
| 95979 | Stonyford, CA | 17.4 mi |
| 95932 | Colusa, CA | 18.3 mi |
| 95950 | Grimes, CA | 19.1 mi |
| 95423 | Clearlake Oaks, CA | 19.2 mi |
| 95457 | Lower Lake, CA | 20.6 mi |
| 95937 | Dunnigan, CA | 21.1 mi |
| 95422 | Clearlake, CA | 21.6 mi |
| 95607 | Capay, CA | 23 mi |
Questions about 95987
What is the ZIP+4 code for 95987?
95987 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 95987, you need to look up a specific street address to get them.
What city is 95987?
95987 is assigned to Williams, California, in Colusa 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.