Maryland · Harford

21010 ZIP Code

21010 is associated with Gunpowder, Maryland. The page shows the county, timezone, nearby ZIPs and links to the state hub for a nearby city generator.

ZIP details

ZIP code: 21010
City: Gunpowder
State: Maryland (MD)
County: Harford
Timezone: America/New_York
State sales tax: Varies by state

Open map Maryland hub

Nearby ZIP codes

21009Abingdon, MD 21012Arnold, MD 21013Baldwin, MD 21014Bel Air, MD 21005Aberdeen Proving Ground, MD 21015Bel Air, MD 21017Belcamp, MD 21018Benson, MD

Questions about 21010

What city is ZIP code 21010 in?+

21010 is associated with Gunpowder, Maryland in the bundled dataset. ZIP areas can cross city and county lines, so use the city and county fields together.

What county is 21010 in?+

Harford. County boundaries and postal areas are not the same thing; a ZIP can serve addresses in more than one county.

What timezone is 21010 in?+

America/New_York. This is the IANA timezone name for the city associated with the ZIP.

Is 21010 a real ZIP code?+

It appears in the public city dataset bundled with this site. That confirms the format and city association, not that a specific street, mailbox, or resident exists.

All ZIP codes Validate a full address