ZIP Code 21128

ZIP code 21128 identifies a postal delivery area inside Perry Hall, Maryland. The ZIP lies within Baltimore County. Clocks here follow the America/New_York time zone (UTC-4).

About 14,023 people live in this ZIP code, and the median household income is roughly $92,635 a year. Figures come from the U.S. Census Bureau American Community Survey and are refreshed as new five-year estimates are released.

What you can do with ZIP code 21128

• Write a mailing address: Perry Hall, MD 21128. The ZIP goes last, after the state abbreviation.
• Check whether a shipping or delivery quote applies to this area — most US carriers price by ZIP code rather than by city.
• Look up the local time zone before scheduling a call — the ZIP tells you which zone applies to that address.
• Compare the ZIP with neighbouring codes to see how population and income shift block by block.