Dallas County, TX ZIP Codes & Directory
Complete postal guide for Dallas County, Texas. Featuring the official county seat of Dallas, largest municipality Dallas, and serving 20 incorporated municipal entities.
Municipalities Located in Dallas County
Incorporated Cities, Towns, and Villages
Addison
townPopulation: 16,661
Highland Park
townPopulation: 8,895
Sunnyvale
townPopulation: 7,893
Dallas
cityPopulation: 1,304,379
Irving
cityPopulation: 254,773
Garland
cityPopulation: 246,018
Grand Prairie
cityPopulation: 196,100
Mesquite
cityPopulation: 150,108
Carrollton
cityPopulation: 133,434
Rowlett
cityPopulation: 62,535
Naples
cityPopulation: 17,450
Nash
cityPopulation: 5,604
Nassau Bay
cityPopulation: 19,037
Natalia
cityPopulation: 8,952
Navasota
cityPopulation: 6,756
Nederland
cityPopulation: 13,372
Needville
cityPopulation: 8,729
Nixon
cityPopulation: 5,353
North Cleveland
cityPopulation: 14,483
Dallas City 56
cityPopulation: 4,900
Active USPS Postal Codes in Dallas County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Dallas County, TX
What is the county seat and largest city in Dallas County? ▾
The official county seat of Dallas County is Dallas, and its largest incorporated municipality by population is Dallas.
How many cities, towns, and villages are in Dallas County? ▾
Dallas County encompasses 20 incorporated municipal entities, including 17 cities, 3 towns, and 0 villages.
What is the total population and land area of Dallas County? ▾
According to official U.S. Census Bureau data, Dallas County has a population of approximately 2,613,539 residents and spans an area of 880 square miles.
How many postal codes operate in Dallas County? ▾
There are 17 active USPS postal codes serving addresses within Dallas County, Texas.