Blank map of Delaware by county
All 3 counties of Delaware, ready to print on Letter, Tabloid, A4 or A3, or to download as PNG and SVG. Free, no sign-up.
Preview · A4 portrait · Numbered
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Print it, copy it and hand it out. If you publish it, credit it like this. For other uses, get in touch.
Mapsfera · data US Census Bureau
Delaware on the map
Delaware has 3 counties, fewer than any other state. The largest is Sussex, with 936 sq mi of land, and the smallest is New Castle, with 426 sq mi: Sussex is about 2 times bigger.
The state capital, Dover, is in Kent County. The capital version marks it on the map.
New Castle County is the most populous, with 588,026 people in 2025, or 55% of the state. The least populous is Kent, with 194,786.
What each county borders
Kent borders the most counties in the state: 2 (New Castle and Sussex).
3 counties touch another state. 3 border Maryland: Kent, New Castle, and Sussex. Only New Castle borders Pennsylvania. Only New Castle borders New Jersey.
Every county is on the coast.
Number key
Numbers follow alphabetical order, from 1 (Kent) to 3 (Sussex). Area is land area, without lakes or sea, and population is the Census estimate for July 1, 2025; “Borders” counts neighboring counties in the same state.
| No. | County | Land area | Population (2025) | Borders |
|---|---|---|---|---|
| 1 | Kent | 586 sq mi | 194,786 | 2 |
| 2 | New Castle | 426 sq mi | 588,026 | 1 |
| 3 | Sussex | 936 sq mi | 277,140 | 1 |
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Frequently asked questions
How many counties does Delaware have?
3 counties. That’s fewer than any other state.
What is the largest county in Delaware?
Sussex, with 936 sq mi of land. The smallest is New Castle, with 426 sq mi.
What is the most populous county in Delaware?
New Castle County, with an estimated 588,026 people in 2025, or 55% of the state.
What county is Dover in?
The state capital, Dover, is in Kent County.
Can I use it in class?
Yes, it’s free. Print it, copy it and hand it out as many times as you like. If you post it on a blog or a class website, credit “Mapsfera · data US Census Bureau”.
How do I print it on US Letter paper?
Choose Letter in “Paper size” and click “Download PDF”. In the print window, pick Letter paper and 100% scale (“Actual size”). For a bigger map, choose Tabloid (11 × 17 in) or A3.
What order are the numbers in?
Alphabetical, from 1 to the last one. That makes the key easy to follow when you grade, and it’s the same key the worksheet’s answer page uses.
Sources
- Boundaries: U.S. Census Bureau, Cartographic Boundary Files 2025, counties at 1:500,000 (public domain)
- Land and water area: U.S. Census Bureau (TIGER/Line and 2025 Gazetteer); population: Vintage 2025 estimates (July 1, 2025)
- State capital: Natural Earth, Populated Places (public domain); which counties it spans, Census places
- Neighbors, coastline and borders: calculated from those boundaries (and checked against the Census county adjacency file)