U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Montgomery County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Montgomery County.

County State ZIP Code City Area Codes
Montgomery County TX 77305 Conroe 936
Montgomery County TX 77306 Conroe 281, 346, 713, 832, 936
Montgomery County TX 77316 Montgomery 281, 346, 713, 832, 936
Montgomery County TX 77318 Willis 936
Montgomery County TX 77328 Cleveland 281, 346, 713, 832, 936
Montgomery County TX 77333 Dobbin 936
Montgomery County TX 77353 Magnolia 713
Montgomery County TX 77354 Magnolia 281, 346, 713, 832, 936
Montgomery County TX 77355 Magnolia 281, 346, 713, 832, 936
Montgomery County TX 77356 Montgomery 936
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.