ZIP Code 20129 — Paeonian Springs, VA
20129 is a standard (street delivery) ZIP code serving Paeonian Springs, Virginia, in Loudoun 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 20129 at a glance
| ZIP code | 20129 |
|---|---|
| Primary city | Paeonian Springs |
| State | Virginia (VA) |
| County | Loudoun FIPS 51107 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 538 |
| Coordinates | 39.166730, -77.594040 |
How ZIP+4 works in 20129
The four digits after the hyphen encode a delivery segment inside 20129. 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 20129 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 20129.
| ZIP | City | Distance |
|---|---|---|
| 20197 | Waterford, VA | 2.4 mi |
| 20176 | Leesburg, VA | 3.3 mi |
| 20158 | Hamilton, VA | 3.7 mi |
| 20175 | Leesburg, VA | 7.1 mi |
| 20132 | Purcellville, VA | 7.1 mi |
| 20180 | Lovettsville, VA | 7.4 mi |
| 21790 | Tuscarora, MD | 8.3 mi |
| 21777 | Point Of Rocks, MD | 8.5 mi |
| 20842 | Dickerson, MD | 9.5 mi |
| 20839 | Bealsville, MD | 9.6 mi |
| 20837 | Poolesville, MD | 10.6 mi |
| 20147 | Ashburn, VA | 10.6 mi |
Questions about 20129
What is the ZIP+4 code for 20129?
20129 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 20129, you need to look up a specific street address to get them.
What city is 20129?
20129 is assigned to Paeonian Springs, Virginia, in Loudoun 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.