NEW CASTLE COUNTY DELAWARE DOG LICENSE
Delaware requires that all dogs age six (6) months or older must be licensed within the county in which they reside. Licenses must be purchased by March 1st, expire on December 31st and are valid statewide. City of Wilmington residents are exempt from purchasing a New Castle County Delaware Dog License, but are still required to obtain a dog license from the City. Service dogs (i.e., seeing eye, lead or guide dogs) are exempt from the licensing fee, but are still required to be licensed.
DOG LICENSE REQUIREMENTS:
All dogs 6 months of age or older as of January 1st in a given calendar year must be licensed within New Castle County before March 1st. If the dog turns 6 months on or after March 1st, the pet owner must license the dog at that time for the current calendar year.
A current rabies vaccination certificate signed or stamped by a veterinarian, including vaccination and expiration dates, is required to get a license. One, two or three year licenses may be purchased, contingent on county and the expiration date of the rabies vaccination. Your pet's rabies vaccination should be valid at least through March 1st of the year in which the license expires.
WHERE TO GET LICENSE:
New Castle County Residents: 
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Online: Register for New Castle County Delaware Dog License Online!
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In Person: Stop by one of the following locations: Delaware Humane Association, Delaware SPCA, Lantana Veterinary, Lums Pond Animal Hospital, New London Veterinary and WalMart (Middletown)
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By Mail: Mail in application with licensing fee, a copy of your dog's current rabies vaccination certificate, and proof of spay/neuter (if applicable) to: New Castle County Dog Licensing, c/o Pet Data, PO Box 141929, Irving, TX 75014. Download New Castle County Delaware Dog License Application.
City of Wilmington Residents:
LICENSING FEE (As of this Post):
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NCC Licensing Fees
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1 Year
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2 Years
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3 Years
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Spayed/Neutered Dog
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$10.00
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$20.00
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$30.00
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Unaltered Dog
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$15.00
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$30.00
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$45.00
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Service Dog*
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$0.00
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$0.00
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$0.00
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Wilmington Licensing Fees
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1 Year
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2 Years
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3 Years
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Spayed/Neutered Dog
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$10.00
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n/a
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$25.00
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Unaltered Dog
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$15.00
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n/a
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$40.00
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Service Dog*
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$0.00
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n/a
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$0.00
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* A service dog license is available for a seeing eye, lead or guide dog with proof of training.
MORE INFORMATION:
Need more information or have questions regarding dog licensing, please use below resources:

New Castle County Residents:
City of Wilmington Residents
This post is for informational purposes only and should be verified by the county where Delaware Dog Licenses are administered and issued. Please contact New Castle County or City of Wilmington for current information or if you have any questions regarding Delaware Dog Licensing.
Pictures in this post are of Lucy Cheng (Courtesy of Dan Pinder). Lucy lives in New Castle County.
Next Post: Kent County Delaware Dog License