McKinney serves as the county seat of Collin County in the Dallas-Fort Worth metroplex, positioned roughly 30 miles north of downtown Dallas along US 75. The city anchors the northern edge of the metro area, with development extending from historic downtown McKinney east toward Lavon Lake and west to the Collin County line, bordered by Frisco to the south and Princeton and Melissa to the north. Once defined by its cotton farming heritage, McKinney has transformed into a major suburban employment center with corporate campuses, healthcare facilities including Medical City McKinney, and the historic downtown square that remains a commercial hub. The population has grown rapidly over the past two decades, drawing families and professionals to master-planned communities like Stonebridge Ranch and Craig Ranch while maintaining pockets of the original agricultural landscape along the city's eastern reaches.
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