Delaware ZIP Codes: Ranges, Prefixes and Major Cities

ZIP codes  |   |  2 min read

Delaware uses 96 active ZIP codes, running from 19701 to 19980. This guide shows how those codes are grouped, which ones serve the state's largest cities and how to format them correctly.

ZIP code range and prefixes

Every Delaware ZIP code starts with one of 3 three-digit prefixes. Each prefix points to a sectional center facility, the processing plant that sorts mail for a group of nearby post offices.

  • 197
  • 198
  • 199

Types of ZIP codes in Delaware

TypeCountWhat it covers
Standard60Street delivery areas
PO Box19Post office boxes only
Unique17A single high-volume organization

ZIP codes for major Delaware cities

CityCountyStandard ZIPsRange
WilmingtonNew Castle County1019801–19810
NewarkNew Castle County519702–19717
DoverKent County319901–19906
BearNew Castle County119701–19701
Bethany BeachSussex County119930–19930
BethelSussex County119931–19931
BridgevilleSussex County119933–19933
Camden WyomingKent County119934–19934
ClaymontNew Castle County119703–19703
ClaytonKent County119938–19938
DagsboroSussex County119939–19939
DelmarSussex County119940–19940
Dover AFBKent County119902–19902
EllendaleSussex County119941–19941
FeltonKent County119943–19943

Dover is the state capital. Larger cities have many ZIP codes because each code follows mail delivery routes, not city limits.

Sample addresses

Susan Walker 1169 Main Blvd Clayton, DE 19938
Wei Allen 8883 Grove Pl Bear, DE 19701
Mary Moore 133 Laurel Blvd Ellendale, DE 19941

These examples use real city and ZIP pairs with invented street lines, so they are safe for testing and documentation.

Tips for working with these ZIP codes

  • Store ZIP codes as text, not numbers, so the format stays consistent across states with leading zeros.
  • All of Delaware is in the Eastern time zone, which keeps scheduling logic simple.
  • A quick sanity check: a valid DE ZIP code begins with one of the prefixes listed above.
  • City names in addresses are post office names. A suburb may share a ZIP code and city name with a nearby larger town.

Create realistic Delaware addresses for testing, with real cities, counties and ZIP codes.

Generate Delaware addresses