New Castle, Delaware

County Seat: Wilmington · Population: 558,753

Find contact information for New Castle government offices in Delaware. The county seat is Wilmington. Below you'll find phone numbers, addresses, and websites for the assessor, treasurer, recorder, clerk, and other county departments.

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Tax Due Dates

Property tax deadlines & email reminders for New Castle

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Local Services

Title abstractors, process servers & more for New Castle

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Frequently Asked Questions

How do I contact the New Castle Assessor?

The New Castle Assessor's office handles property valuations, assessments, and exemptions. Find their phone number and address in the Property Records section above.

Where do I pay property taxes in New Castle?

Property tax payments in New Castle are handled by the Treasurer's office. Check the listing above for contact information, mailing address, and online payment options.

How do I get a copy of a deed in New Castle?

Property deeds, liens, and recorded documents are maintained by the New Castle Recorder's office. You can typically request copies in person, by mail, or through their online portal if available.

Where do I get a marriage license in New Castle?

Marriage licenses in New Castle are issued by the County Clerk's office. Contact them for requirements, fees, and appointment availability.

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