ZIP Code 21012 Population

Arnold, Maryland

Population

20,713

Households

7,446

Median Age

40.7

Population Details

Average Household Size 2.78 persons
Data SourceUS Census Bureau, 2012–2016 ACS 5-year estimates

Frequently Asked Questions

ZIP code 21012 (Arnold, MD) has a population of 20,713 according to US Census Bureau, 2012–2016 ACS 5-year estimates.

There are 7,446 households in ZIP code 21012.

ZIP Code 21012

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