Mckinney, TX is a city located in Collin County, Texas and has a land area of 131.16 square miles (339.70 km2). The water area for the city is 1.42 square miles or 3.68 km2. There are 4 total unique zip codes in Mckinney, Texas. The area code(s) for Mckinney is 469/214/972.
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