Collin County consists of all or part of the following 30 cities:
- Allen, TX
- Anna, TX
- Blue Ridge, TX
- Carrollton, TX
- Celina, TX
- Copeville, TX
- Dallas, TX
- Fairview, TX
- Farmersville, TX
- Frisco, TX
- Garland, TX
- Josephine, TX
- Lavon, TX
- Lowry Crossing, TX
- Lucas, TX
- Melissa, TX
- Murphy, TX
- Nevada, TX
- New Hope, TX
- Parker, TX
- Plano, TX
- Princeton, TX
- Propser, TX
- Richardson, TX
- Royce City, TX
- Sachse, TX
- Saint Paul, TX
- Val Alstyne, TX
- Weston, TX