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The definition of the northern boundary of the state is highly unusual. Most of the boundary between Delaware and Pennsylvania is defined by an arc extending 12 miles (19 km) from the cupola of the courthouse in New Castle, and is referred to as the Twelve-Mile Circle. This is the only true-arc political boundary in the United States. This border extends all of the way to the low-tide mark on the New Jersey shore, which continues down the shoreline until it again reaches the twelve-mile arc in the south; then the boundary continues in a more conventional way in the middle of the main channel (thalweg) of the Delaware River Estuary. A portion of this arc extends into Maryland to the west, and the remaining western border is a tangent to this arc that runs a bit to the east. The Wedge of land between the arc and the Maryland border was claimed by both Delaware and Pennsylvania until 1921, when Delaware's claim was confirmed.

New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of 2000 its population was 500,265. The county seat is Wilmington. The center of population of Delaware is located in New Castle County, in the town of Townsend. It is the most affluent county in the state of Delaware.

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News from The Delaware News Journal

Nature's landscapes

Aug 21, 2008 5:23 pm

Proper choices, planning can provide enjoyment now as well as into the fall

Maddow gets show on MSNBC

Aug 20, 2008 8:20 pm

WASHINGTON -- Rachel Maddow has been sounding off about politics on MSNBC so often she might as well have her own show.

Little tables have become a big trend

Aug 20, 2008 8:20 pm

Those looking to update their living space for fall without going all-out might want to consider some of today's smart, sophisticated new side tables.

Economic slowdown not showing well on Broadway productions

Aug 20, 2008 7:47 pm

NEW YORK -- Now it's "Godspell" that is saying "no go" on Broadway.

New & notable

Aug 20, 2008 7:40 pm

It's not that tough to keep up with cleaning the inside of your home's windows. Outside, it's about as easy as finding a contact lens in an ocean.

Utage, first Japanese sushi bar in state, is closing

Aug 20, 2008 4:39 pm

The Oka family, owners of Utage Authentic Japanese Cuisine, said they are closing the 22-year-old eatery that's parked in the corner of the Independence Mall off U.S. 202. The last business day is Aug...

The virtues of angel food

Aug 19, 2008 9:34 pm

There seems to be little fence sitting when it comes to angel food cake.

Jiffy mixes innovation with expansion

Aug 19, 2008 9:31 pm

When Howdy Holmes arrived in 1987 at Chelsea Milling Co. in Chelsea, Mich., the maker of Jiffy mixes, the market was moving rapidly. The family business was not.

What I ate on my summer vacation

Aug 19, 2008 9:26 pm

If you went away for summer vacation, hopefully, you brought back more than just a lousy T-shirt. What about food memories and experiences?

The Red Menace

Aug 19, 2008 9:24 pm

Get 'em while the getting is good. Vine-ripened tomatoes, now at their peak, are the sweet jewels of summer.

Greg Norman's Southern Cross Developments Selects River Rim Ranch

Greg Norman’s Southern Cross Developments, proprietor of the exclusive “Norman Estates” real estate brand, is pleased to announce that River Rim Ranch in Teton Valley, Idaho will be the location for its newest project, the “Norman Ranch Estates. [Read More]

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