About 19890 - Wilmington, Delaware
19890 is a mid-sized ZIP code covering Wilmington in Delaware, the United States. This area falls under Wilmington County County.
Wilmington has a reported population of 26,706. This is roughly in line with the Delaware average of about 22,856 residents.
Median household income is about $77,400 (near the Delaware average).
This ZIP code sits alongside neighboring areas like Delmar, Wilmington, Dover within Delaware.