Delaware Area Codes
1 active area code · Wilmington · Population around 1,050,123
Delaware has 1 active area code, serving cities like Wilmington, Dover, and Newark. 302 has covered the whole of Delaware since 1947. Each code below links to its cities, carriers, timezone, and coverage map.
Delaware Area Code Map
What area codes does Delaware have?
Every one of the 3 counties in Delaware is covered by this code and no other.
How many phone prefixes does Delaware use?
Delaware's area code holds 609 assigned prefixes, listed under 38 distinct carrier names. A prefix is the three digits after the area code, and NANPA assigns each one to a single carrier.
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Frequently Asked Questions
How many area codes does Delaware have?
Delaware has 1 active area code: 302.
What is the main area code for Delaware?
Delaware has a single area code, 302, in service since 1947. It covers Wilmington, the largest city in Delaware, and every county in Delaware.
What are the largest cities in Delaware?
The largest cities in Delaware include Wilmington, Dover, Newark, Middletown, Bear.
What is the total population of Delaware?
Delaware has an estimated total population of 1,050,123 based on US Census PEP 2024 data.
What is the newest area code in Delaware?
302, in service since 1947. It is the only area code in Delaware.
Is my county covered by more than one area code in Delaware?
No. All 3 counties in Delaware are covered by 302, so no county here carries two.