Collin County, TX ZIP Codes & Directory
Complete postal guide for Collin County, Texas. Featuring the official county seat of McKinney, largest municipality Plano, and serving 7 incorporated municipal entities.
Municipalities Located in Collin County
Incorporated Cities, Towns, and Villages
Prosper
townPopulation: 37,746
Fairview
townPopulation: 10,450
Plano
cityPopulation: 288,288
Frisco
cityPopulation: 200,509
McKinney
cityPopulation: 195,308
Collin City 42
cityPopulation: 4,550
Collin City 296
cityPopulation: 10,900
Active USPS Postal Codes in Collin County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Collin County, TX
What is the county seat and largest city in Collin County? ▾
The official county seat of Collin County is McKinney, and its largest incorporated municipality by population is Plano.
How many cities, towns, and villages are in Collin County? ▾
Collin County encompasses 7 incorporated municipal entities, including 5 cities, 2 towns, and 0 villages.
What is the total population and land area of Collin County? ▾
According to official U.S. Census Bureau data, Collin County has a population of approximately 1,064,465 residents and spans an area of 848 square miles.
How many postal codes operate in Collin County? ▾
There are 6 active USPS postal codes serving addresses within Collin County, Texas.