ZIP code 20604
Where is ZIP code 20604?
Waldorf, Maryland
Charles County · PO Box only ZIP code
ZIP code 20604 belongs to Waldorf, Maryland in Charles County. 20604 is a PO Box only ZIP code: it is used for post office boxes at the Waldorf post office, not for street addresses. It is in the Eastern Time zone and uses area code 240. The closest ZIP codes are 20646 (La Plata, 1.1 mi north), 20611 (Bel Alton, 2.5 mi south) and 20677 (Port Tobacco, 3.3 mi west).
| ZIP code | 20604 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Waldorf |
| Also accepted | Saint Charles |
| State | Maryland (MD) |
| County | Charles County |
| Time zone | Eastern Time · now |
| Area code | 240 |
| Coordinates | 38.5095, -76.9817 map |
| 3-digit prefix | 206 |
The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.
ZIP codes near 20604
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 20646 | La Plata, MD | 1.1 mi N | Standard |
| 20611 | Bel Alton, MD | 2.5 mi S | Standard |
| 20677 | Port Tobacco, MD | 3.3 mi W | Standard |
| 20632 | Faulkner, MD | 4.9 mi S | Standard |
| 20675 | Pomfret, MD | 5.5 mi N | Standard |
| 20695 | White Plains, MD | 6.1 mi N | Standard |
| 20693 | Welcome, MD | 6.8 mi SW | Standard |
| 20602 | Waldorf, MD | 7 mi NE | Standard |
| 20617 | Bryantown, MD | 7.7 mi E | Standard |
| 20603 | Waldorf, MD | 8.3 mi N | Standard |
| 20643 | Ironsides, MD | 9 mi W | PO Box only |
| 20622 | Charlotte Hall, MD | 9.9 mi E | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 20604 or measure the distance to another ZIP code.
How to address mail to 20604
PO BOX 123
WALDORF MD 20604
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts SAINT CHARLES as the city name for 20604. Adding the 4-digit ZIP+4 code (20604-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Waldorf, MD
All Waldorf ZIP codes with population and income →
Questions
- What city is ZIP code 20604?
- 20604 is a Waldorf, Maryland ZIP code. Saint Charles is also accepted as the city name.
- What county is 20604 in?
- ZIP code 20604 is in Charles County, Maryland.
- What time zone is ZIP code 20604 in?
- 20604 is in the Eastern Time zone (America/New_York).
- What area code is 20604?
- Phone numbers in ZIP code 20604 use area code 240.
- Can I use 20604 for a street address?
- No. 20604 is only for PO Boxes. Street addresses in Waldorf use 20601, 20602, 20603.
- What ZIP codes are near 20604?
- The nearest ZIP codes to 20604 are 20646 (La Plata, 1.1 miles), 20611 (Bel Alton, 2.5 miles), 20677 (Port Tobacco, 3.3 miles) and 20632 (Faulkner, 4.9 miles).