New Castle County property tax
Homeowners in New Castle County, Delaware typically pay about 0.71% of their home's value in property tax each year — a median bill of $2,499 on a median home value of $352,200.
Typical effective rate
0.71%
higher than 59% of U.S. counties
Median tax paid
$2,499
per year
Median home value
$352,200
In DE
#1
of 3 ranked counties
At a glance
- Effective rate 0.71% — 24% lower than the U.S. median of 0.94%, and 41% higher than the Delaware median of 0.50%.
- With vs. without a mortgage — median tax $2,517 for mortgaged homes, $2,446 for homes owned outright.
- State ranking — 1st highest effective rate of 3 ranked Delaware counties; nationally it sits around the 41th percentile.
Estimate a bill for New Castle County
Apply this county's typical effective rate (0.71%) to a home value of your choice.
Frequently asked questions
What is the property tax rate in New Castle County, DE?
The typical effective property-tax rate in New Castle County is 0.71% of a home's value per year, based on median taxes paid ($2,499) divided by the median home value ($352,200) in the Census ACS 2020–2024 5-year estimates. This is a typical burden for comparison, not a statutory mill rate.
How much is property tax on a typical home in New Castle County?
The median owner-occupied home in New Castle County is valued at $352,200, and the median real estate tax paid is $2,499 per year. Homes with a mortgage have a median tax of $2,517, versus $2,446 for homes without one.
How does New Castle County compare to the rest of Delaware?
New Castle County's effective rate is 41% higher than the Delaware median, ranking 1st of 3 ranked counties in the state.
Compare nearby Delaware counties
Counties ranked closest to New Castle County by in-state effective rate. Open the comparison tool or see all Delaware counties.
| In-state | County | Effective rate | Median tax |
|---|---|---|---|
| 2 | Kent County | 0.43% | $1,363 |
| 3 | Sussex County | 0.32% | $1,222 |
Official data & resources for New Castle County
- New Castle County Census profile (data.census.gov) — housing, value and tax figures for this county.
- Table B25103 for New Castle County — median real estate taxes paid (the source for the tax figures above).
- Table B25077 for New Castle County — median home value.
- Federal forms & is property tax deductible? — IRS Pub 530, Schedule A and the SALT cap, plus your state tax agency.
Finding your exact bill
Your county or municipal assessor (sometimes called the appraisal district, property appraiser, or tax collector) sets the assessed value and the exact millage that produces your bill. Search for "[county name] [state] assessor" or "property tax" on an official .gov site.
Figures on this page are Census survey medians for the whole county (2020–2024 5-year), not an assessment of any individual property. Rates, exemptions and assessment practices vary by municipality and school district within a county.