Collin County was formed in the year 1846 and named after Collin McKinney. The area covered by the county is 886 sq mi. More than 0.83 million people with a rich blend of different and diverse races including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others along with 0.18 million households and 0.13 million family units inhabit in this region. McKinney is the county seat and Plano is the largest city.

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