In which county is ZIP code 45203 located?

ZIP 45203 is listed under Hamilton County, OH.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 45203: Cincinnati, OH

ZIP: 45203

County: Hamilton County

Coordinates: 39.10750, -84.52570

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 45203 in Cincinnati, OH. We include verified county details for Hamilton County plus key geographic references used for mapping and logistics.

Primary City	Cincinnati
ZIP Code	45203
County	Hamilton County
State	OH
Latitude / Longitude	39.10750, -84.52570
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 45203 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 45203 are listed as 39.10750 / -84.52570, useful for GPS and service checks in and around Cincinnati, OH.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 45203 for mail delivery and general location reference in Hamilton County, OH.

This ZIP may extend beyond the city core into nearby communities within Hamilton County.

Related ZIP Codes (Nearby)

Explore other postal codes near Cincinnati within OH.

Frequently Asked Questions

What is the primary city for ZIP code 45203?

The primary city for this ZIP code is Cincinnati, located in OH.

In which county is 45203 located?

ZIP code 45203 is situated within Hamilton County, OH.

What are the coordinates for 45203?

The approximate center point is 39.10750 (Latitude) and -84.52570 (Longitude).

Is ZIP code 45203 active?

This page lists ZIP 45203 as Listed based on the latest refresh date shown above.

Does ZIP 45203 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