Delaware Zip Codes

Delaware has a total of 96 ZIP codes, reflecting its small geographic size but diverse mix of urban, suburban, and rural areas. All ZIP codes in Delaware begin with the digits 19, which are exclusive to the state. The range starts at 19701 in Bear and ends at 19980 in Viola, covering all three counties: New Castle, Kent, and Sussex.

The 197 series primarily serves the northern part of the state, including cities such as Wilmington, Newark, and New Castle. The 199 series covers central and southern Delaware, including Dover, the state capital, and beach communities like Rehoboth Beach and Lewes.

Delaware’s ZIP codes are essential for efficient mail delivery and logistical planning in a state where population density varies significantly between the northern urban areas and the southern rural and coastal regions. These codes also support administrative functions such as school districting, tax jurisdictions, and public service delivery.

In the table below, you can see all Delaware zip codes listed by city, town and village as well as county affiliated. With 57 cities (and towns) and 3 counties (and county-equivalents), Delaware is the 45th largest state by population (952,065)  and 49th largest one by land area (5,047 km²) in the United States.

The capital of Delaware is Wilmington and major cities include Dover, Newark, Middletown, and Smyrna.

List of Delaware Zip Codes by City