McKinney, TX grew up around a historic courthouse square that still anchors its downtown, and it has been the seat of Collin County since 1848. Imaging centers and outpatient surgery centers line US-75 and the SH-121 corridor that runs through the city. It sits about thirty miles north of Dallas on US-75, the North Central Expressway, where the Sam Rayburn Tollway and US-380 feed in. SH-5 parallels the freeway to the east through the older part of town. Housing runs more affordable than the inner-ring Dallas suburbs, which keeps drawing families north. Both DFW and Love Field are about thirty-three miles southwest, and US-75 carries the commute straight into Dallas.