Sussex County, Delaware ZIP code

ZIP code 19966, Sussex County, Delaware: parcels and places

As of 2026-08-09, SussexCounty.ai counts 15,262 tax parcels covering 27,225.0 mapped acres in ZIP code 19966, Sussex County, Delaware. The parcels fall in Millsboro, plus unincorporated county land. Of the parcels, 75.1 percent lie outside every incorporated town. These are parcel counts compiled by SussexCounty.ai, not Census ZIP Code Tabulation Area figures.

ZIP code 19966 at a glance

MeasureValue
Tax parcels15,262
Mapped acres27,225.0
Median parcel acres0.270
Unit count sum9,283
Parcels outside every town (unincorporated)75.1%
Parcels inside a town24.9%
Top towns by parcelsMillsboro (3,806)

Figures are as of 2026-08-09. Counts of 1 to 4 are shown as "<5". Towns with fewer than 5 parcels in this ZIP code are not listed. "Unit count" is the dwelling-unit field in the county parcel layer; most parcels carry no value, so the sum is not a housing-unit count. ZIP code is a mail-delivery designation, not a town boundary.

Source: SussexCounty.ai, Sussex County tax parcels by ZIP code, as of 2026-08-09, https://sussexcounty.ai/data/parcels-by-zip/

License: these statistics are published under CC BY 4.0. Reuse is welcome with credit to SussexCounty.ai and a link to this page.