ZIP Code: 21920 - ELK MILLS, MD
ZIP Code 21920 is assigned to ELK MILLS, MD. In addition to basic details, this page includes the full ZIP+4 Codes and address information for ZIP Code 21920. You can also find related data, such as nearby ZIP Codes and other relevant geographic details.
21920 ZIP+4 Code List
ZIP Code 21920 includes many ZIP+4 Codes. Each ZIP+4 Code corresponds to a specific address or group of addresses. Below is a complete list of all ZIP+4 Codes within ZIP Code 21920, along with their associated addresses. You can also find a 9-digit ZIP Code by entering a full address.
| ZIP+4 Code | Address |
|---|---|
| 21920-0001 | PO BOX 1 (From 1 To 26), ELK MILLS, MD |
| 21920-0027 | PO BOX 27, ELK MILLS, MD |
| 21920-0028 | PO BOX 28 (From 28 To 38), ELK MILLS, MD |
| 21920-0039 | PO BOX 39, ELK MILLS, MD |
| 21920-0040 | PO BOX 40 (From 40 To 43), ELK MILLS, MD |
| 21920-0044 | PO BOX 44, ELK MILLS, MD |
| 21920-0045 | PO BOX 45 (From 45 To 47), ELK MILLS, MD |
| 21920-0048 | PO BOX 48 (From 48 To 84), ELK MILLS, MD |
| 21920-0085 | PO BOX 85 (From 85 To 128), ELK MILLS, MD |
| 21920-0129 | PO BOX 129 (From 129 To 130), ELK MILLS, MD |
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Post Office in ZIP Code 21920
ELK MILLS is the only post office in ZIP Code 21920. You can find the address, phone number, and interactive map below. Click to view the service and service hours about ELK MILLS.
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ELK MILLS Post Office
Address 732 ELK MILLS RD, ELK MILLS, MD, 21920-9998
Phone 410-398-4474
*Lot Parking Available
How to write a U.S. envelope?
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First, you need to fill in the recipient's mailing information in the center of the envelope. The first line is the recipient's name, the second line is the street address with a detailed house number, and the last line is the city, state abbr, and ZIP Code.
Second, write the sender's information on the left top corner of the envelope. If your mail cannot be delivered, it will return to the sender's address.
Finally, don't forget to stick the stamp on the right top corner. Otherwise, the letter will not go into the delivery process.
Here is the envelope example below.

What does each digit of ZIP Code 21920 stand for?
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The first digit designates a national area, which ranges from zero for the Northeast to nine for the far West.
The 2-3 digits represent a sectional center facility in that region.
The last two digits designate small post offices or postal zones.

Random Address in ZIP Code 21920
ZIP Code 21920 Map
This is the online map of ELK MILLS, Cecil County, Maryland. You can use the controls to move around and zoom in or out. Map information is for reference only.
Nearby ZIP Codes to 21920
Nearby ZIP Codes include 21916, 21921, 21922, 19716, and 19717. These ZIP Codes are located within approximately 25 kilometers of ZIP Code 21920. The listed distances are approximate and provided for reference only.
| ZIP Code | Distance (Kilo Meters) |
|---|---|
| 21916 | 4.073 |
| 21921 | 5.932 |
| 21922 | 6.064 |
| 19716 | 6.72 |
| 19717 | 6.803 |
| 19715 | 6.917 |
| 19712 | 7.173 |
| 19718 | 7.173 |
| 19725 | 7.173 |
| 19726 | 7.173 |
| 19714 | 7.916 |
| 19351 | 7.954 |
| 19347 | 9.795 |
| 19711 | 10.262 |
| 19713 | 10.636 |
| 19702 | 11.45 |
| 19350 | 12.471 |
| 19701 | 12.596 |
| 21901 | 14.063 |
| 19360 | 14.137 |
| 19352 | 14.362 |
| 19708 | 15.037 |
| 21914 | 16.163 |
| 19808 | 16.211 |
| 19346 | 16.97 |
| 21915 | 17.731 |
| 19707 | 18.613 |
| 21911 | 18.827 |
| 19804 | 18.878 |
| 19311 | 19.12 |
| 19733 | 19.248 |
| 19374 | 19.392 |
| 19363 | 19.441 |
| 19390 | 20.504 |
| 19720 | 20.836 |
| 21903 | 20.897 |
| 19736 | 21.003 |
| 21904 | 21.018 |
| 19318 | 21.455 |
| 19362 | 22.205 |
| 19805 | 22.417 |
| 19721 | 22.46 |
| 19706 | 22.915 |
| 21917 | 23.402 |
| 21902 | 23.442 |
| 19807 | 23.669 |
| 19735 | 24.425 |
| 19709 | 24.498 |
| 19710 | 24.499 |
| 19348 | 24.657 |
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