In which county is ZIP code 17121 located?

ZIP 17121 is listed under Dauphin, PA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 17121: Harrisburg, PA

ZIP: 17121

County: Dauphin

Coordinates: 40.29440, -76.89380

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Harrisburg, PA postal area 17121. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Harrisburg
ZIP Code	17121
County	Dauphin
State	PA
Latitude / Longitude	40.29440, -76.89380
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 17121 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 17121 is approximately 40.29440 (latitude) and -76.89380 (longitude). This location sits within Dauphin, contributing to regional planning across PA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 17121 for mail delivery and general location reference in Dauphin, PA.

Some addresses near Harrisburg may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Harrisburg within PA.

Frequently Asked Questions

What is the primary city for ZIP code 17121?

The primary city for this ZIP code is Harrisburg, located in PA.

In which county is 17121 located?

ZIP code 17121 is situated within Dauphin, PA.

What are the coordinates for 17121?

The approximate center point is 40.29440 (Latitude) and -76.89380 (Longitude).

Is ZIP code 17121 active?

This page lists ZIP 17121 as Listed based on the latest refresh date shown above.

Does ZIP 17121 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08