ZIP Code 33503

33503 is one of Florida's ZIP codes, delivering to addresses in Balm, Hillsborough County.

City: Balm
County: Hillsborough County
State: Florida
Prefix: 335xx

Where this code sits

33503 is part of the 335xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Balm.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 33503 delivers to without sharing its boundary.

ZIP codes nearest 33503

The ZIP codes whose reference points sit closest to 33503.
ZIP code	Distance	Delivers to
ZIP code 33579	2.6 mi	Riverview, FL
ZIP code 33598	5.1 mi	Wimauma, FL
ZIP code 33573	6.0 mi	Sun City Center, FL
ZIP code 33569	6.0 mi	Riverview, FL
ZIP code 33534	7.9 mi	Gibsonton, FL
ZIP code 33578	8.3 mi	Riverview, FL
ZIP code 33572	8.4 mi	Apollo Beach, FL
ZIP code 33596	9.0 mi	Valrico, FL

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 33503, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 33503. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.