About 21042 - Ellicott City, Maryland
The ZIP code 21042 of Ellicott City falls within Maryland, the United States - a densely populated area by population. It sits within Ellicott City County.
Census data puts the population of this ZIP code at 41,011 residents. That's noticeably above the average for a Maryland ZIP code, which sits near 23,118 people.
Median household income is about $105,500 (near the Maryland average).
This ZIP code sits alongside neighboring areas like Essex, White Marsh, Frederick within Maryland.