ZIP Code 20737 — Riverdale, MD
20737 is a standard (street delivery) ZIP code serving Riverdale, 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 20737 at a glance
| ZIP code | 20737 |
|---|---|
| Primary city | Riverdale |
| State | Maryland (MD) |
| County | Prince George's FIPS 24033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 24,489 |
| Coordinates | 38.962470, -76.915710 |
How ZIP+4 works in 20737
The four digits after the hyphen encode a delivery segment inside 20737. 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 20737 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 20737.
| ZIP | City | Distance |
|---|---|---|
| 20710 | Bladensburg, MD | 1.5 mi |
| 20784 | Hyattsville, MD | 1.6 mi |
| 20781 | Hyattsville, MD | 1.8 mi |
| 20722 | Brentwood, MD | 2.6 mi |
| 20742 | College Park, MD | 2.6 mi |
| 20782 | Hyattsville, MD | 2.6 mi |
| 20740 | College Park, MD | 2.8 mi |
| 20770 | Greenbelt, MD | 3 mi |
| 20712 | Mount Rainier, MD | 3 mi |
| 20785 | Hyattsville, MD | 3.5 mi |
| 20706 | Lanham, MD | 3.5 mi |
| 20783 | Hyattsville, MD | 3.8 mi |
Questions about 20737
What is the ZIP+4 code for 20737?
20737 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 20737, you need to look up a specific street address to get them.
What city is 20737?
20737 is assigned to Riverdale, 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.