NEW CASTLE County, DE Real Estate

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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 of the three counties in the state of Delaware.

This county is part of the Delaware Valley area.

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