ZIP Code 99022 — Medical Lake, WA
99022 is a standard (street delivery) ZIP code serving Medical Lake, Washington, in Spokane 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 99022 at a glance
| ZIP code | 99022 |
|---|---|
| Primary city | Medical Lake |
| State | Washington (WA) |
| County | Spokane FIPS 53063 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 8,767 |
| Coordinates | 47.600840, -117.708690 |
How ZIP+4 works in 99022
The four digits after the hyphen encode a delivery segment inside 99022. 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 99022 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 99022.
| ZIP | City | Distance |
|---|---|---|
| 99011 | Fairchild Air Force Base, WA | 3.1 mi |
| 99014 | Four Lakes, WA | 5.9 mi |
| 99001 | Airway Heights, WA | 6.3 mi |
| 99224 | Spokane, WA | 8.7 mi |
| 99029 | Reardan, WA | 9 mi |
| 99020 | Marshall, WA | 10.2 mi |
| 99008 | Edwall, WA | 12.5 mi |
| 99201 | Spokane, WA | 13.4 mi |
| 99204 | Spokane, WA | 13.5 mi |
| 99004 | Cheney, WA | 13.7 mi |
| 99205 | Spokane, WA | 13.9 mi |
| 99203 | Spokane, WA | 14.4 mi |
Questions about 99022
What is the ZIP+4 code for 99022?
99022 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 99022, you need to look up a specific street address to get them.
What city is 99022?
99022 is assigned to Medical Lake, Washington, in Spokane 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.