Sussex County Post Office

Find Sussex County Delaware post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Bethany Beach Post Office 14 North Pennsylvania Avenue Bethany Beach DE 19930 302-539-9874


Bethel Post Office 7748 Main Street Bethel DE 19931 302-875-4461

Bridgeville Post Office 300 Walnut Street Bridgeville DE 19933 302-337-7354

Dagsboro Post Office 28290 Clayton Street Dagsboro DE 19939 302-732-9404

Delmar Post Office 101 East Grove Street Delmar DE 19940 302-846-3170

Ellendale Post Office 508 Main Street Ellendale DE 19941 302-422-4900

Frankford Post Office 1 Main Street Millsboro DE 19966 302-732-6891

Georgetown Post Office 115 South King Street Georgetown DE 19947 302-856-3647

Greenwood Post Office 2 Market Street Greenwood DE 19950 302-349-4006

Harbeson Post Office 26454 Lewes Georgetown Highway Harbeson DE 19951 302-684-3295

Laurel Post Office 1121 South Central Avenue Laurel DE 19956 302-875-3613

Lewes Post Office 116 Front Street Lewes DE 19958 302-645-0235

Lincoln Post Office 8419 Road 38B Lincoln DE 19960 302-422-5645

Milford Post Office 110 Causey Avenue Milford DE 19963 302-422-5618

Millsboro Post Office 100 Main Street Millsboro DE 19966 302-934-9226

Milton Post Office 219 Milton Ellendale Highway Milton DE 19968 302-684-5142

Nassau Post Office 5 Point Drive Lewes DE 19958 302-645-2565

Ocean View Post Office 35764 Atlantic Avenue Millville DE 19967 302-539-9466

Rehoboth Beach Post Office 179 Rehoboth Avenue Rehoboth Beach DE 19971 302-227-8406

Seaford Post Office 2001 Bridgeville Highway Seaford DE 19973 302-628-3441

What Change of Address options are available?

Customers can request a temporary or permanent Change of Address either online or in person at the Post Office using PS Form 3575. The online application for Change of Address has a $1.00 identity validation fee.

Is it possible to insure mail and items sent via the USPS?

Yes. Standard mail can be insured for up to $5,000 for an additional fee. Registered mail items can be insured for up to $50,000.

What is the USPS Office of Inspector General?

The Office of Inspector General (OIG) is a division within the USPS responsible for ensuring the integrity and accountability of the postal service. It conducts investigations to safeguard the postal system and performs audits and reviews.