McKinney reports population growth, major road projects under way including Spur 399 and Highway 380 planning
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Summary
City planners told a joint meeting Feb. 28 that McKinney’s official population is just over 224,000 and that large transportation projects — Spur 399, Highway 380 bypass planning and multiple local road and intersection improvements — are in various stages of planning and construction.
City planning and engineering officials told a joint meeting on Feb. 28 that McKinney’s population and housing growth remain strong and that several major roadway projects are under way or in planning, including a multi‑phase Spur 399 project and a long‑term Highway 380 bypass.
Jennifer Arnold, director of planning, said the city’s official population as of Jan. 1, 2025, is "just over 224,000 people," and that about 60% of that population lives inside the MISD boundary (approximately 140,000 people). Arnold said the city issued just over 2,300 single‑family residential permits in the prior year and that three multifamily projects issued building permits in the last year account for just over 1,000 units.
Matt Richardson, assistant director of engineering, summarized major transportation projects and timelines. He said Spur 399 — the Sam Rayburn Tollway extension around the south end of the airport — is a roughly $1,000,000,000 project and that the city expects phases of the project to advance over the next several years. Richardson said TxDOT is planning Highway 380 work across the region and that the latest estimate for the larger 380 bypass project is about $3,000,000,000 and could take eight to 10 years to complete once fully funded and phased.
Richardson also outlined local projects the city is delivering: Wilmeth Road extensions and roundabouts to improve east‑west connectivity, a new segment of Collin McKinney Parkway near the stadium (now opening), the Virginia Street and Throckmorton Street project near City Hall, and other intersection and turn‑lane improvements around Boyd High School and Lake Forest.
When asked about localized congestion on FM 546 and routes into Princeton, Richardson said the corridor is ultimately state‑maintained, that Collin County and TxDOT have begun planning work for a potential new alignment, and that funding remains unresolved.
City staff provided links to an annual development report online for additional statistics and project maps. Officials said the long‑range facility and transportation planning is intended to align with development patterns and MISD growth over the next 20 years.
