ZIP Code 20770 — Greenbelt, MD
20770 is a standard (street delivery) ZIP code serving Greenbelt, Maryland, in Prince George's 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 20770 at a glance
| ZIP code | 20770 |
|---|---|
| Primary city | Greenbelt |
| State | Maryland (MD) |
| County | Prince George's FIPS 24033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 28,384 |
| Coordinates | 38.999810, -76.885670 |
How ZIP+4 works in 20770
The four digits after the hyphen encode a delivery segment inside 20770. 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 20770 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.
Other ZIP codes in Greenbelt
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 20770.
| ZIP | City | Distance |
|---|---|---|
| 20771 | Greenbelt, MD | 1.6 mi |
| 20740 | College Park, MD | 2.4 mi |
| 20706 | Lanham, MD | 3 mi |
| 20737 | Riverdale, MD | 3 mi |
| 20742 | College Park, MD | 3.1 mi |
| 20705 | Beltsville, MD | 3.2 mi |
| 20784 | Hyattsville, MD | 3.3 mi |
| 20769 | Glenn Dale, MD | 3.8 mi |
| 20708 | Laurel, MD | 4.2 mi |
| 20710 | Bladensburg, MD | 4.5 mi |
| 20783 | Hyattsville, MD | 4.5 mi |
| 20781 | Hyattsville, MD | 4.8 mi |
Questions about 20770
What is the ZIP+4 code for 20770?
20770 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 20770, you need to look up a specific street address to get them.
What city is 20770?
20770 is assigned to Greenbelt, Maryland, in Prince George's 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.